Combined Measurement of the Higgs Boson Mass in pp Collisions atffiffi

sp ¼ 7 and 8 TeV

with the ATLAS and CMS Experiments

G. Aad et al.*

(ATLAS Collaboration)†

(CMS Collaboration)‡

(Received 25 March 2015; published 14 May 2015)

A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLASand CMS experiments at the CERN LHC in the H → γγ and H → ZZ → 4l decay channels. The resultsare obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels andfor the two experiments. The measured masses from the individual channels and the two experimentsare found to be consistent among themselves. The combined measured mass of the Higgs boson ismH ¼ 125.09� 0.21 ðstatÞ � 0.11 ðsystÞ GeV.DOI: 10.1103/PhysRevLett.114.191803 PACS numbers: 14.80.Bn, 13.85.Qk

The study of the mechanism of electroweak symmetrybreaking is one of the principal goals of the CERN LHCprogram. In the standard model (SM), this symmetrybreaking is achieved through the introduction of a complexdoublet scalar field, leading to the prediction of theHiggs boson H [1–6], whose mass mH is, however, notpredicted by the theory. In 2012, the ATLAS and CMSCollaborations at the LHC announced the discovery of aparticle with Higgs-boson-like properties and a mass ofabout 125 GeV [7–9]. The discovery was based primarilyon mass peaks observed in the γγ and ZZ → lþl−l0þl0−(denoted H → ZZ → 4l for simplicity) decay channels,where one or both of the Z bosons can be off shell andwhere l and l0 denote an electron or muon. With mHknown, all properties of the SM Higgs boson, such as itsproduction cross section and partial decay widths, can bepredicted. Increasingly precise measurements [10–13] haveestablished that all observed properties of the new particle,including its spin, parity, and coupling strengths to SMparticles are consistent within the uncertainties with thoseexpected for the SM Higgs boson.The ATLAS and CMS Collaborations have independ-

ently measured mH using the samples of proton-protoncollision data collected in 2011 and 2012, commonlyreferred to as LHC Run 1. The analyzed samples corre-spond to approximately 5 fb−1 of integrated luminosity atffiffiffi

sp ¼ 7 TeV, and 20 fb−1 at

ffiffiffi

sp ¼ 8 TeV, for each experi-

ment. Combined results in the context of the separateexperiments, as well as those in the individual channels, arepresented in Refs. [12,14–16].

This Letter describes a combination of the Run 1 datafrom the two experiments, leading to improved precisionfor mH. Besides its intrinsic importance as a fundamentalparameter, improved knowledge of mH yields more precisepredictions for the other Higgs boson properties.Furthermore, the combined mass measurement providesa first step towards combinations of other quantities, suchas the couplings. In the SM, mH is related to the values ofthe masses of the W boson and top quark through loop-induced effects. Taking into account other measured SMquantities, the comparison of the measurements of theHiggs boson, W boson, and top quark masses can be usedto directly test the consistency of the SM [17] and thus tosearch for evidence of physics beyond the SM.The combination is performed using only the H → γγ

and H → ZZ → 4l decay channels, because these twochannels offer the best mass resolution. Interferencebetween the Higgs boson signal and the continuum back-ground is expected to produce a downward shift of thesignal peak relative to the true value of mH. The overalleffect in the H → γγ channel [18–20] is expected to be afew tens of MeV for a Higgs boson with a width near theSM value, which is small compared to the current pre-cision. The effect in theH → ZZ → 4l channel is expectedto be much smaller [21]. The effects of the interference onthe mass spectra are neglected in this Letter.The ATLAS and CMS detectors [22,23] are designed to

precisely reconstruct charged leptons, photons, hadronicjets, and the imbalance of momentum transverse to thedirection of the beams. The two detectors are based ondifferent technologies requiring different reconstructionand calibration methods. Consequently, they are subjectto different sources of systematic uncertainty.The H → γγ channel is characterized by a narrow

resonant signal peak containing several hundred eventsper experiment above a large falling continuum back-ground. The overall signal-to-background ratio is a few

*Full author list given at the end of the article.

Published by the American Physical Society under the terms ofthe Creative Commons Attribution 3.0 License. Further distri-bution of this work must maintain attribution to the author(s) andthe published article’s title, journal citation, and DOI.

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0031-9007=15=114(19)=191803(33) 191803-1 © 2015 CERN, for the ATLAS and CMS Collab.

percent. Both experiments divide the H → γγ events intodifferent categories depending on the signal purity and massresolution, as a means to improve sensitivity. While CMSuses the same analysis procedure for the measurement of theHiggs boson mass and couplings [15], ATLAS implementsseparate analyses for the couplings [24] and for themass [14];the latter analysis classifies events in a manner that reducesthe expected systematic uncertainties in mH.The H → ZZ → 4l channel yields only a few tens of

signal events per experiment, but has very little back-ground, resulting in a signal-to-background ratio largerthan 1. The events are analyzed separately depending on theflavor of the lepton pairs. To extractmH, ATLAS employs atwo-dimensional (2D) fit to the distribution of the four-lepton mass and a kinematic discriminant introduced toreject the main background, which arises from ZZ con-tinuum production. The CMS procedure is based on athree-dimensional fit, utilizing the four-lepton mass dis-tribution, a kinematic discriminant, and the estimatedevent-by-event uncertainty in the four-lepton mass. Bothanalyses are optimized for the mass measurement andneither attempts to distinguish between different Higgsboson production mechanisms.There are only minor differences in the parametrizations

used for the present combination compared to those usedfor the combination of the two channels by the individualexperiments. These differences have almost no effect on theresults.The measurement of mH, along with its uncertainty, is

based on the maximization of profile-likelihood ratios ΛðαÞin the asymptotic regime [25,26]:

ΛðαÞ ¼ L(α; ˆ̂θðαÞ)Lðα̂; θ̂Þ ; ð1Þ

where L represents the likelihood function, α the param-eters of interest, and θ the nuisance parameters. There arethree types of nuisance parameters: those corresponding tosystematic uncertainties, the fitted parameters of the back-ground models, and any unconstrained signal modelparameters not relevant to the particular hypothesis undertest. Systematic uncertainties are discussed below. Theother two types of nuisance parameters are incorporatedinto the statistical uncertainty. The θ terms are profiled, i.e.,for each possible value of a parameter of interest (e.g.,mH),all nuisance parameters are refitted to maximize L. The α̂and θ̂ terms denote the unconditional maximum likelihoodestimates of the best-fit values for the parameters, whileˆ̂θðαÞ is the conditional maximum likelihood estimate forgiven parameter values α.The likelihood functions L are constructed using signal

and background probability density functions (PDFs) thatdepend on the discriminating variables: for the H → γγchannel, the diphoton mass, and, for the H → ZZ → 4lchannel, the four-lepton mass (for CMS, also its uncer-tainty) and the kinematic discriminant. The signal PDFs are

derived from samples of Monte Carlo (MC) simulatedevents. For the H → ZZ → 4l channel, the backgroundPDFs are determined using a combination of simulationand data control regions. For the H → γγ channel, thebackground PDFs are obtained directly from the fit to thedata. The profile-likelihood fits to the data are performed asa function of mH and the signal-strength scale factorsdefined below. The fitting framework is implementedindependently by ATLAS and CMS, using the ROOFIT

[27], ROOSTATS [28], and HISTFACTORY [29] data modelingand handling packages.Despite the current agreement between the measured

Higgs boson properties and the SMpredictions, it is pertinentto perform a mass measurement that is as independent aspossible of SM assumptions. For this purpose, three signal-strength scale factors are introduced and profiled in the fit,thus reducing the dependence of the results on assumptionsabout the Higgs boson couplings and about the variationof the production cross section (σ) times branching fraction(BF) with the mass. The signal strengths are defined asμ ¼ ðσexpt × BFexptÞ=ðσSM × BFSMÞ, representing the ratioof the cross section times branching fraction in the experi-ment to the corresponding SM expectation for the differentproduction and decay modes. Two factors, μγγggFþtt̄H andμγγVBFþVH, are used to scale the signal strength in theH → γγchannel. The production processes involving Higgs bosoncouplings to fermions, namely gluon fusion (ggF) andassociated production with a top quark-antiquark pair(tt̄H), are scaled with the μγγggFþtt̄H factor. The productionprocesses involving couplings to vector bosons, namelyvector boson fusion (VBF) and associated production witha vector boson (VH), are scaledwith the μγγVBFþVH factor. Thethird factor μ4l is used to scale the signal strength in theH → ZZ → 4l channel. Only a single signal-strengthparameter is used for H → ZZ → 4l events because themH measurement in this case is found to exhibit almost nosensitivity to the different production mechanisms.The procedure based on the two scale factors μγγggFþtt̄H

and μγγVBFþVH for the H → γγ channel was previouslyemployed by CMS [15] but not by ATLAS. Instead,ATLAS relied on a single H → γγ signal-strength scalefactor. The additional degree of freedom introduced byATLAS for the present study results in a shift of about40 MeV in the ATLAS H → γγ result, leading to a shift of20 MeV in the ATLAS combined mass measurement.The individual signal strengths μγγggFþtt̄H, μ

γγVBFþVH, and

μ4l are assumed to be the same for ATLAS and CMS, andare profiled in the combined fit for mH. The correspondingprofile-likelihood ratio isΛðmHÞ

¼L½mH; ˆ̂μγγggFþtt̄HðmHÞ; ˆ̂μγγVBFþVHðmHÞ; ˆ̂μ4lðmHÞ; ˆ̂θðmHÞ�

Lðm̂H; μ̂γγggFþtt̄H; μ̂

γγVBFþVH; μ̂

4l; θ̂Þ :

ð2Þ

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Slightly more complex fit models are used, as describedbelow, to perform additional compatibility tests betweenthe different decay channels and between the results fromATLAS and CMS.Combining the ATLAS and CMS data for the H → γγ

and H → ZZ → 4l channels according to the aboveprocedure, the mass of the Higgs boson is determined to be

mH ¼ 125.09� 0.24 GeV

¼ 125.09� 0.21 ðstatÞ � 0.11 ðsystÞ GeV; ð3Þwhere the total uncertainty is obtained from the width ofa negative log-likelihood ratio scan with all parametersprofiled. The statistical uncertainty is determined by fixingall nuisance parameters to their best-fit values, except forthe three signal-strength scale factors and the H → γγbackground function parameters, which are profiled. Thesystematic uncertainty is determined by subtracting inquadrature the statistical uncertainty from the total uncer-tainty. Equation (3) shows that the uncertainties in the mHmeasurement are dominated by the statistical term, evenwhen the Run 1 data sets of ATLAS and CMS arecombined. Figure 1 shows the negative log-likelihood ratioscans as a function of mH, with all nuisance parametersprofiled (solid curves), and with the nuisance parametersfixed to their best-fit values (dashed curves).The signal strengths at the measured value of mH are

found to be μγγggFþtt̄H ¼ 1.15þ0.28−0.25 , μγγVBFþVH ¼ 1.17þ0.58

−0.53 ,

and μ4l ¼ 1.40þ0.30−0.25 . The combined overall signal strength

μ (with μγγggFþtt̄H ¼ μγγVBFþVH ¼ μ4l ≡ μ) is μ ¼ 1.24þ0.18−0.16 .

The results reported here for the signal strengths are notexpected to have the same sensitivity, nor exactly the samevalues, as those that would be extracted from a combinedanalysis optimized for the coupling measurements.The combined ATLAS and CMS results for mH in the

separate H → γγ and H → ZZ → 4l channels are

mγγH ¼ 125.07� 0.29 GeV

¼ 125.07� 0.25 ðstatÞ � 0.14 ðsystÞ GeV ð4Þand

m4lH ¼ 125.15� 0.40 GeV

¼ 125.15� 0.37 ðstatÞ � 0.15 ðsystÞ GeV: ð5ÞThe corresponding likelihood ratio scans are shown inFig. 1. For the H → ZZ → 4l channel, the systematicuncertainty is dominated by the absolute scale uncertaintyin the momentum measurement for the muons and in themomentum and energy measurements for the electrons.Large samples (> 107 events) of dilepton decays of theJ=ψ , ϒðnSÞ, and Z resonances are used by both experi-ments to evaluate the absolute scales and to correct forresidual misalignments in the inner tracker systems [14,16].The systematic uncertainty in the ATLAS mH result fromH → ZZ → 4l decays was conservatively set to 60 MeV inRef. [14] to account for the limited numerical precision inits estimate. A more precise procedure, resulting in areduced systematic uncertainty of 40 MeV, is used here.For CMS, conservative systematic uncertainties of 0.1% forthe H → ZZ → 4μ and 2μ2e channels, and 0.3% for theH → ZZ → 4e channel, were obtained in Ref. [16] and areused here.A summary of the results from the individual analyses

and their combination is presented in Fig. 2.The observed uncertainties in the combined measure-

ment can be compared with expectations. The latter areevaluated by generating two Asimov data sets [26], wherean Asimov data set is a representative event sample thatprovides both the median expectation for an experimentalresult and its expected statistical variation, in the asymp-totic approximation, without the need for an extensiveMC-based calculation. The first Asimov data set is a“prefit” sample, generated using mH ¼ 125.0 GeV andthe SM predictions for the couplings, with all nuisanceparameters fixed to their nominal values. The secondAsimov data set is a “postfit” sample, in which mH, thethree signal strengths μγγggFþtt̄H, μ

γγVBFþVH, and μ4l, and all

nuisance parameters are fixed to their best-fit estimatesfrom the data. The expected uncertainties for the combinedmass are

δmHprefit ¼ �0.24 GeV

¼ �0.22 ðstatÞ � 0.10 ðsystÞ GeV ð6Þ

(GeV)Hm

124 124.5 125 125.5 126

)H

m(Λ

2ln

−

0

1

2

3

4

5

6

7CMS and ATLAS

Run 1LHC

γγ→Hl4→ZZ→H

l+4γγCombinedStat only uncert.

FIG. 1 (color online). Scans of twice the negative log-likelihood ratio −2 lnΛðmHÞ as functions of the Higgs bosonmass mH for the ATLAS and CMS combination of the H → γγ(red), H → ZZ → 4l (blue), and combined (black) channels.The dashed curves show the results accounting for statisticaluncertainties only, with all nuisance parameters associated withsystematic uncertainties fixed to their best-fit values. The 1 and 2standard deviation limits are indicated by the intersections of thehorizontal lines at 1 and 4, respectively, with the log-likelihoodscan curves.

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for the prefit case and

δmHpostfit ¼ �0.22 GeV

¼ �0.19 ðstatÞ � 0.10 ðsystÞ GeV ð7Þfor the postfit case, which are both very similar to theobserved uncertainties reported in Eq. (3).Constraining all signal yields to their SM predictions

results in an mH value that is about 70 MeV larger than thenominal result with a comparable uncertainty. The increasein the central value reflects the combined effect of thehigher-than-expected H → ZZ → 4l measured signalstrength and the increase of theH → ZZ branching fractionwith mH. Thus, the fit assuming SM couplings forces themass to a higher value in order to accommodate the valueμ ¼ 1 expected in the SM.Since the discovery, both experiments have improved

their understanding of the electron, photon, and muonmeasurements [16,30–34], leading to a significant reduc-tion of the systematic uncertainties in the mass measure-ment. Nevertheless, the treatment and understanding ofsystematic uncertainties is an important aspect of theindividual measurements and their combination. The com-bined analysis incorporates approximately 300 nuisanceparameters. Among these, approximately 100 are fittedparameters describing the shapes and normalizations of thebackground models in the H → γγ channel, including anumber of discrete parameters that allow the functionalform in each of the CMS H → γγ analysis categories tobe changed [35]. Of the remaining almost 200 nuisanceparameters, most correspond to experimental or theoreticalsystematic uncertainties.Based on the results from the individual experiments, the

dominant systematic uncertainties for the combined mHresult are expected to be those associated with the energy or

momentum scale and its resolution: for the photons in theH → γγ channel and for the electrons and muons in theH → ZZ → 4l channel [14–16]. These uncertainties areassumed to be uncorrelated between the two experimentssince they are related to the specific characteristics of thedetectors as well as to the calibration procedures, whichare fully independent except for negligible effects due tothe use of the common Z boson mass [36] to specifythe absolute energy and momentum scales. Other exper-imental systematic uncertainties [14–16] are similarlyassumed to be uncorrelated between the two experiments.Uncertainties in the theoretical predictions and in themeasured integrated luminosities are treated as fully andpartially correlated, respectively.To evaluate the relative importance of the different

sources of systematic uncertainty, the nuisance parametersare grouped according to their correspondence to threebroad classes of systematic uncertainty: (1) uncertainties inthe energy or momentum scale and resolution for photons,electrons, and muons (“scale”), (2) theoretical uncertain-ties, e.g., uncertainties in the Higgs boson cross section andbranching fractions, and in the normalization of SMbackground processes (“theory”), (3) other experimentaluncertainties (“other”).First, the total uncertainty is obtained from the full profile-

likelihood scan, as explained above. Next, parametersassociated with the scale terms are fixed and a new scanis performed. Then, in addition to the scale terms, theparameters associated with the theory terms are fixed anda scan performed. Finally, in addition, the other parametersare fixed and a scan performed. Thus the fits are performediteratively, with the different classes of nuisance parameterscumulatively held fixed to their best-fit values. The uncer-tainties associated with the different classes of nuisanceparameters are defined by the difference in quadrature

(GeV)Hm

123 124 125 126 127 128 129

Total Stat SystCMS and ATLAS Run 1LHC Total Syst Stat

l+4γγCMS+ATLAS 0.11) GeV± 0.21 ± 0.24 ( ±125.09

l 4CMS+ATLAS 0.15) GeV± 0.37 ± 0.40 ( ±125.15

γγCMS+ATLAS 0.14) GeV± 0.25 ± 0.29 ( ±125.07

l4→ZZ→HCMS 0.17) GeV± 0.42 ± 0.45 ( ±125.59

l4→ZZ→HATLAS 0.04) GeV± 0.52 ± 0.52 ( ±124.51

γγ→HCMS 0.15) GeV± 0.31 ± 0.34 ( ±124.70

γγ→HATLAS 0.27) GeV± 0.43 ± 0.51 ( ±126.02

FIG. 2 (color online). Summary of Higgs boson mass measurements from the individual analyses of ATLAS and CMS and from thecombined analysis presented here. The systematic (narrower, magenta-shaded bands), statistical (wider, yellow-shaded bands), and total(black error bars) uncertainties are indicated. The (red) vertical line and corresponding (gray) shaded column indicate the central valueand the total uncertainty of the combined measurement, respectively.

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between the uncertainties resulting from consecutive scans.The statistical uncertainty is determined from the final scan,with all nuisance parameters associated with systematicterms held fixed, as explained above. The result is

mH ¼ 125.09� 0.21 ðstatÞ � 0.11 ðscaleÞ � 0.02 ðotherÞ� 0.01 ðtheoryÞ GeV; ð8Þ

fromwhich it is seen that the systematic uncertainty is indeeddominated by the energy and momentum scale terms.The result in Eq. (8) is consistent with the values of mHderived from the less preciseWW and ττ Higgs boson decaymodes [37–40].The relative importance of the various sources of

systematic uncertainty is further investigated by dividingthe nuisance parameters into yet-finer groups, with eachgroup associated with a specific underlying effect, andevaluating the impact of each group on the overall massuncertainty. The matching of nuisance parameters to aneffect is not strictly rigorous because nuisance parametersin the two experiments do not always represent exactly thesame effect and in some cases multiple effects are relatedto the same nuisance parameter. Nevertheless, the relativeimpact of the different effects can be explored. A fewexperiment-specific groups of nuisance parameters aredefined. For example, ATLAS includes a group of nuisanceparameters to account for the inaccuracy of the backgroundmodeling for the H → γγ channel. To model this back-ground, ATLAS uses specific analytic functions in eachcategory [14] while CMS simultaneously considers differ-ent background parametrizations [35]. The systematicuncertainty in mH related to the background modeling inCMS is estimated to be negligible [15].The impact of groups of nuisance parameters is evalu-

ated starting from the contribution of each individualnuisance parameter to the total uncertainty. This contribu-tion is defined as the mass shift δmH observed whenreevaluating the profile-likelihood ratio after fixing thenuisance parameter in question to its best-fit valueincreased or decreased by 1 standard deviation (σ) in itsdistribution. For a nuisance parameter whose PDF is aGaussian distribution, this shift corresponds to the con-tribution of that particular nuisance parameter to the finaluncertainty. The impact of a group of nuisance parametersis estimated by summing in quadrature the contributionsfrom the individual parameters.The impacts δmH due to each of the considered effects are

listed inTable I. The results are reported for the four individualchannels, both for the data and (in parentheses) the prefitAsimov data set. The row labeled “Systematic uncertainty(sum in quadrature)” shows the total sums in quadrature of theindividual terms in the table. The row labeled “Systematicuncertainty (nominal)” shows the corresponding total sys-tematic uncertainties derived using the subtraction in quad-rature method discussed in connection with Eq. (3). The two

methods to evaluate the total systematic uncertainty are seento agree within 10 MeV, which is comparable with theprecision of the estimates. The two rightmost columns ofTable I list the contribution of each group of nuisanceparameters to the uncertainties in the combined mass meas-urement, for ATLAS and CMS separately.The statistical and total uncertainties are summarized in

the bottom section of Table I. Since the weight of a channelin the final combination is determined by the inverse ofthe squared uncertainty, the approximate relative weightsfor the combined result are 19% (H → γγ) and 18%(H → ZZ → 4l) for ATLAS, and 40% (H → γγ) and23% (H → ZZ → 4l) for CMS. These weights are reportedin the last row of Table I, along with the expected values.Figure 3 presents the impact of each group of nuisance

parameters on the total systematic uncertainty in the massmeasurement of ATLAS, CMS, and the combination. Forthe individual ATLAS and CMS measurements, the resultsin Fig. 3 are approximately equivalent to the sum inquadrature of the respective δmH terms in Table I multi-plied by their analysis weights, after normalizing theseweights to correspond to either ATLAS only or CMS only.The ATLAS and CMS combined results in Fig. 3 are thesum in quadrature of the combined results in Table I.The results in Table I and Fig. 3 establish that the largest

systematic effects for the mass uncertainty are those relatedto the determination of the energy scale of the photons,followed by those associated with the determination ofthe electron and muon momentum scales. Since the CMSH → γγ channel has the largest weight in the combination,its impact on the systematic uncertainty of the combinedresult is largest.The mutual compatibility of themH results from the four

individual channels is tested using a likelihood ratio withfour masses in the numerator and a common mass in thedenominator, and thus three degrees of freedom. The threesignal strengths are profiled in both the numerator anddenominator as in Eq. (1). The resulting compatibility,defined as the asymptotic p value of the fit, is 10%.Allowing the ATLAS and CMS signal strengths to varyindependently yields a compatibility of 7%. This latter fitresults in an mH value that is 40 MeV larger than thenominal result.The compatibility of the combined ATLAS and CMS

mass measurement in the H → γγ channel with the com-bined measurement in the H → ZZ → 4l channel isevaluated using the variable ΔmγZ ≡mH

γγ −mH4l as the

parameter of interest, with all other parameters, includingmH, profiled. Similarly, the compatibility of the ATLAScombined mass measurement in the two channels with theCMS combined measurement in the two channels isevaluated using the variable Δmexpt ≡mATLAS

H −mCMSH .

The observed results, ΔmγZ ¼ −0.1� 0.5 GeV andΔmexpt ¼ 0.4� 0.5 GeV, are both consistent with zerowithin 1σ. The difference between the mass values in

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the two experiments is Δmexptγγ ¼ 1.3� 0.6 GeV (2.1σ) for

the H → γγ channel and Δmexpt4l ¼ −0.9� 0.7 GeV (1.3σ)

for the H → ZZ → 4l channel. The combined resultsexhibit a greater degree of compatibility than the resultsfrom the individual decay channels because the Δmexpt

value has opposite signs in the two channels.The compatibility of the signal strengths from

ATLAS and CMS is evaluated through the ratiosλexpt ¼ μATLAS=μCMS, λexptF ¼ μγγATLASggFþtt̄H =μγγCMS

ggFþtt̄H, and

λexpt4l ¼ μ4lATLAS=μ4lCMS. For this purpose, each ratio isindividually taken to be the parameter of interest, with allother nuisance parameters profiled, including the remaining

two ratios for the first two tests. We find λexpt ¼ 1.21þ0.30−0.24 ,

λexptF ¼ 1.3þ0.8−0.5 , and λexpt4l ¼ 1.3þ0.5

−0.4 , all of which are con-sistent with unity within 1σ. The ratio λexptV ¼μγγATLASVBFþVH=μ

γγCMSVBFþVH is omitted because the ATLAS mass

measurement in the H → γγ channel is not sensitiveto μγγVBFþVH=μ

γγggFþtt̄H.

The correlation between the signal strength and themeasured mass is explored with 2D likelihood scans asfunctions of μ and mH. The three signal strengths areassumed to be the same: μγγggFþtt̄H ¼ μγγVBFþVH ¼ μ4l ≡ μ,and thus the ratios of the production cross sectionstimes branching fractions are constrained to the SM

TABLE I. Systematic uncertainties δmH (see text) associated with the indicated effects for each of the four input channels, and thecorresponding contributions of ATLAS and CMS to the systematic uncertainties of the combined result. “ECAL” refers to theelectromagnetic calorimeters. The numbers in parentheses indicate expected values obtained from the prefit Asimov data set discussedin the text. The uncertainties for the combined result are related to the values of the individual channels through the relative weight of theindividual channel in the combination, which is proportional to the inverse of the respective uncertainty squared. The top section of thetable divides the sources of systematic uncertainty into three classes, which are discussed in the text. The bottom section of the tableshows the total systematic uncertainties estimated by adding the individual contributions in quadrature, the total systematic uncertaintiesevaluated using the nominal method discussed in the text, the statistical uncertainties, the total uncertainties, and the analysis weights,illustrative of the relative weight of each channel in the combined mH measurement.

Uncertainty in ATLASresults (GeV):

observed (expected)

Uncertainty in CMSresults (GeV):

observed (expected)

Uncertainty in combinedresult (GeV):

observed (expected)

H → γγ H → ZZ → 4l H → γγ H → ZZ → 4l ATLAS CMS

Scale uncertainties:ATLAS ECAL nonlinearityor CMS photon nonlinearity

0.14 (0.16) � � � 0.10 (0.13) � � � 0.02 (0.04) 0.05 (0.06)

Material in front of ECAL 0.15 (0.13) � � � 0.07 (0.07) � � � 0.03 (0.03) 0.04 (0.03)ECAL longitudinal response 0.12 (0.13) � � � 0.02 (0.01) � � � 0.02 (0.03) 0.01 (0.01)ECAL lateral shower shape 0.09 (0.08) � � � 0.06 (0.06) � � � 0.02 (0.02) 0.03 (0.03)Photon energy resolution 0.03 (0.01) � � � 0.01 ð<0.01Þ � � � 0.02 ð<0.01Þ <0.01 ð<0.01ÞATLAS H → γγ vertex andconversion reconstruction

0.05 (0.05) � � � � � � � � � 0.01 (0.01) � � �

Z → ee calibration 0.05 (0.04) 0.03 (0.02) 0.05 (0.05) � � � 0.02 (0.01) 0.02 (0.02)CMS electron energy scaleand resolution

� � � � � � � � � 0.12 (0.09) � � � 0.03 (0.02)

Muon momentum scaleand resolution

� � � 0.03 (0.04) � � � 0.11 (0.10) <0.01 ð0.01Þ 0.05 (0.02)

Other uncertainties:ATLAS H → γγ backgroundmodeling

0.04 (0.03) � � � � � � � � � 0.01 (0.01) � � �

Integrated luminosity 0.01 ð<0.01Þ <0.01 ð<0.01Þ 0.01 ð<0.01Þ <0.01 ð<0.01Þ 0.01 ð<0.01ÞAdditional experimentalsystematic uncertainties

0.03 ð<0.01Þ <0.01 ð<0.01Þ 0.02 ð<0.01Þ 0.01 ð<0.01Þ 0.01 ð<0.01Þ 0.01 ð<0.01Þ

Theory uncertainties: <0.01 ð<0.01Þ <0.01 ð<0.01Þ 0.02 ð<0.01Þ < 0.01 ð<0.01Þ 0.01 ð<0.01ÞSystematic uncertainty(sum in quadrature)

0.27 (0.27) 0.04 (0.04) 0.15 (0.17) 0.16 (0.13) 0.11 (0.10)

Systematic uncertainty(nominal)

0.27 (0.27) 0.04 (0.05) 0.15 (0.17) 0.17 (0.14) 0.11 (0.10)

Statistical uncertainty 0.43 (0.45) 0.52 (0.66) 0.31 (0.32) 0.42 (0.57) 0.21 (0.22)

Total uncertainty 0.51 (0.52) 0.52 (0.66) 0.34 (0.36) 0.45 (0.59) 0.24 (0.24)Analysis weights 19% (22%) 18% (14%) 40% (46%) 23% (17%) � � �

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predictions. Assuming that the negative log-likelihood ratio−2 lnΛðμ; mHÞ is distributed as a χ2 variable with twodegrees of freedom, the 68% confidence level (C.L.)confidence regions are shown in Fig. 4 for each individualmeasurement, as well as for the combined result.In summary, a combined measurement of the Higgs

boson mass is performed in theH→ γγ andH → ZZ → 4lchannels using the LHC Run 1 data sets of the ATLAS

and CMS experiments, with minimal reliance on theassumption that the Higgs boson behaves as predictedby the SM.The result is

mH ¼ 125.09� 0.24 GeV

¼ 125.09� 0.21 ðstatÞ � 0.11 ðsystÞ GeV; ð9Þ

where the total uncertainty is dominated by the statisticalterm, with the systematic uncertainty dominated by effectsrelated to the photon, electron, and muon energy ormomentum scales and resolutions. Compatibility tests areperformed to ascertain whether the measurements areconsistent with each other, both between the different decaychannels and between the two experiments. All tests onthe combined results indicate consistency of the differentmeasurements within 1σ, while the four Higgs boson massmeasurements in the two channels of the two experimentsagree within 2σ. The combined measurement of the Higgsboson mass improves upon the results from the individualexperiments and is the most precise measurement to date ofthis fundamental parameter of the newly discovered particle.

We thank CERN for the very successful operation of theLHC, as well as the support staff from our institutionswithout whom ATLAS and CMS could not be operatedefficiently. We acknowledge the support of ANPCyT(Argentina); YerPhI (Armenia); ARC (Australia);BMWFW and FWF (Austria); ANAS (Azerbaijan);SSTC (Belarus); FNRS and FWO (Belgium); CNPq,CAPES, FAPERJ, and FAPESP (Brazil); MES

0 0.05 0.1

ATLASObservedExpected

combined resultUncertainty in ATLAS

0 0.05 0.1

(GeV)Hmδ

CMSObservedExpected

combined resultUncertainty in CMS

0 0.02 0.04 0.06

CombinedObservedExpected

combined resultUncertainty in LHC

Theory uncertainties

Additional experimentalsystematic uncertainties

Integrated luminosity

background modelingγγ→HATLAS

Muon momentum scale and resolution

CMS electron energy scale and resolution

calibration ee→Z

vertex and conversionγγ→HATLASreconstruction

Photon energy resolution

ECAL lateral shower shape

ECAL longitudinal response

Material in front of ECAL

ATLAS ECAL nonlinearity /photon nonlinearityCMS

CMS and ATLAS Run 1LHC

FIG. 3 (color online). The impacts δmH (see text) of the nuisance parameter groups in Table I on the ATLAS (left), CMS (center), andcombined (right) mass measurement uncertainty. The observed (expected) results are shown by the solid (empty) bars.

(GeV)Hm

124 124.5 125 125.5 126 126.5 127

) μS

igna

l str

engt

h (

0.5

1

1.5

2

2.5

3CMS and ATLAS

Run 1LHC

γγ→HATLASl4→ZZ→HATLAS

γγ→HCMSl4→ZZ→HCMS

All combined

Best fit68% C.L.

FIG. 4 (color online). Summary of likelihood scans in the 2Dplane of signal strength μ versus Higgs boson mass mH for theATLAS and CMS experiments. The 68% C.L. confidence regionsof the individual measurements are shown by the dashed curvesand of the overall combination by the solid curve. The markersindicate the respective best-fit values. The SM signal strength isindicated by the horizontal line at μ ¼ 1.

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(Bulgaria); NSERC, NRC, and CFI (Canada); CERN;CONICYT (Chile); CAS, MoST, and NSFC (China);COLCIENCIAS (Colombia); MSES and CSF (Croatia);RPF (Cyprus); MSMT CR, MPO CR, and VSC CR (CzechRepublic); DNRF, DNSRC, and Lundbeck Foundation(Denmark); MoER, ERC IUT, and ERDF (Estonia);EPLANET, ERC, and NSRF (European Union);Academy of Finland, MEC, and HIP (Finland); CEA,CNRS/IN2P3 (France); GNSF (Georgia); BMBF, DFG,HGF, MPG, and AvH Foundation (Germany); GSRT andNSRF (Greece); RGC (Hong Kong SAR, China); OTKAand NIH (Hungary); DAE and DST (India); IPM (Iran); SFI(Ireland); ISF, MINERVA, GIF, I-CORE, and BenoziyoCenter (Israel); INFN (Italy); MEXT and JSPS (Japan);JINR; MSIP, and NRF (Republic of Korea); LAS(Lithuania); MOE and UM (Malaysia); CINVESTAV,CONACYT, SEP, and UASLP-FAI (Mexico); CNRST(Morocco); FOM and NWO (Netherlands); MBIE (NewZealand); BRF and RCN (Norway); PAEC (Pakistan);MNiSW, MSHE, NCN, and NSC (Poland); GRICES andFCT (Portugal); MNE/IFA (Romania); MES of Russia,MON, RosAtom, RAS, and RFBR (Russian Federation);MSTD and MESTD (Serbia); MSSR (Slovakia); ARRSandMIZŠ (Slovenia); DST/NRF (South Africa); MINECO,SEIDI, and CPAN (Spain); SRC and WallenbergFoundation (Sweden); ETH Board, ETH Zurich, PSI,SER, SNSF, UniZH, and Cantons of Bern, Genève, andZurich (Switzerland); NSC (Taipei); MST (Taiwan);ThEPCenter, IPST, STAR, and NSTDA (Thailand);TUBITAK and TAEK (Turkey); NASU and SFFR(Ukraine); STFC and the Royal Society and LeverhulmeTrust (U.K.); DOE and NSF (U.S.). In addition, wegratefully acknowledge the crucial computing support fromall WLCG partners, in particular from CERN and the Tier-1and Tier-2 facilities worldwide.

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A. Cervelli,17,† S. A. Cetin,19b,† A. Chafaq,135a,† D. Chakraborty,108,† I. Chalupkova,129,† P. Chang,165,† B. Chapleau,87,†

J. D. Chapman,28,† D. G. Charlton,18,† C. C. Chau,158,† C. A. Chavez Barajas,149,† S. Cheatham,152,† A. Chegwidden,90,†

S. Chekanov,6,† S. V. Chekulaev,159a,† G. A. Chelkov,65,i,† M. A. Chelstowska,89,† C. Chen,64,† H. Chen,25,† K. Chen,148,†

L. Chen,33d,j,† S. Chen,33c,† X. Chen,33f,† Y. Chen,67,†H. C. Cheng,89,†Y. Cheng,31,†A. Cheplakov,65,† E. Cheremushkina,130,†

R. Cherkaoui El Moursli,135e,† V. Chernyatin,25,a,† E. Cheu,7,† L. Chevalier,136,† V. Chiarella,47,† J. T. Childers,6,†

G. Chiodini,73a,† A. S. Chisholm,18,† R. T. Chislett,78,† A. Chitan,26a,† M. V. Chizhov,65,† K. Choi,61,† S. Chouridou,9,†

B. K. B. Chow,100,† V. Christodoulou,78,† D. Chromek-Burckhart,30,† M. L. Chu,151,† J. Chudoba,127,† A. J. Chuinard,87,†

J. J. Chwastowski,39,† L. Chytka,115,† G. Ciapetti,132a,132b,† A. K. Ciftci,4a,† D. Cinca,53,† V. Cindro,75,† I. A. Cioara,21,†

A. Ciocio,15,† Z. H. Citron,172,† M. Ciubancan,26a,† A. Clark,49,† B. L. Clark,57,† P. J. Clark,46,† R. N. Clarke,15,†

W. Cleland,125,† C. Clement,146a,146b,† Y. Coadou,85,† M. Cobal,164a,164c,† A. Coccaro,138,† J. Cochran,64,† L. Coffey,23,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-10

J. G. Cogan,143,† B. Cole,35,† S. Cole,108,† A. P. Colijn,107,† J. Collot,55,† T. Colombo,58c,† G. Compostella,101,†

P. Conde Muiño,126a,126b,† E. Coniavitis,48,† S. H. Connell,145b,† I. A. Connelly,77,† S.M. Consonni,91a,91b,† V. Consorti,48,†

S. Constantinescu,26a,† C. Conta,121a,121b,† G. Conti,30,† F. Conventi,104a,k,† M. Cooke,15,† B. D. Cooper,78,†

A.M. Cooper-Sarkar,120,† T. Cornelissen,175,† M. Corradi,20a,† F. Corriveau,87,l,† A. Corso-Radu,163,† A. Cortes-Gonzalez,12,†

G. Cortiana,101,† G. Costa,91a,† M. J. Costa,167,† D. Costanzo,139,† D. Côté,8,† G. Cottin,28,† G. Cowan,77,† B. E. Cox,84,†

K. Cranmer,110,† G. Cree,29,† S. Crépé-Renaudin,55,† F. Crescioli,80,† W.A. Cribbs,146a,146b,† M. Crispin Ortuzar,120,†

M. Cristinziani,21,† V. Croft,106,† G. Crosetti,37a,37b,† T. Cuhadar Donszelmann,139,† J. Cummings,176,† M. Curatolo,47,†

C. Cuthbert,150,† H. Czirr,141,† P. Czodrowski,3,† S. D’Auria,53,† M. D’Onofrio,74,†

M. J. Da Cunha Sargedas De Sousa,126a,126b,† C. Da Via,84,† W. Dabrowski,38a,† A. Dafinca,120,† T. Dai,89,† O. Dale,14,†

F. Dallaire,95,† C. Dallapiccola,86,† M. Dam,36,† J. R. Dandoy,31,† N. P. Dang,48,† A. C. Daniells,18,† M. Danninger,168,†

M. Dano Hoffmann,136,† V. Dao,48,† G. Darbo,50a,† S. Darmora,8,† J. Dassoulas,3,† A. Dattagupta,61,† W. Davey,21,†

C. David,169,† T. Davidek,129,† E. Davies,120,m,† M. Davies,153,† P. Davison,78,† Y. Davygora,58a,† E. Dawe,88,† I. Dawson,139,†

R. K. Daya-Ishmukhametova,86,† K. De,8,† R. de Asmundis,104a,† S. De Castro,20a,20b,† S. De Cecco,80,† N. De Groot,106,†

P. de Jong,107,† H. De la Torre,82,† F. De Lorenzi,64,† L. De Nooij,107,† D. De Pedis,132a,† A. De Salvo,132a,† U. De Sanctis,149,†

A. De Santo,149,† J. B. De Vivie De Regie,117,† W. J. Dearnaley,72,† R. Debbe,25,† C. Debenedetti,137,† D. V. Dedovich,65,†

I. Deigaard,107,† J. Del Peso,82,† T. Del Prete,124a,124b,† D. Delgove,117,† F. Deliot,136,† C.M. Delitzsch,49,† M. Deliyergiyev,75,†

A. Dell’Acqua,30,† L. Dell’Asta,22,† M. Dell’Orso,124a,124b,† M. Della Pietra,104a,k,† D. della Volpe,49,† M. Delmastro,5,†

P. A. Delsart,55,† C. Deluca,107,† D. A. DeMarco,158,† S. Demers,176,† M. Demichev,65,† A. Demilly,80,† S. P. Denisov,130,†

D. Derendarz,39,† J. E. Derkaoui,135d,† F. Derue,80,† P. Dervan,74,† K. Desch,21,† C. Deterre,42,† P. O. Deviveiros,30,†

A. Dewhurst,131,† S. Dhaliwal,107,†A. Di Ciaccio,133a,133b,† L. Di Ciaccio,5,†A. Di Domenico,132a,132b,† C. Di Donato,104a,104b,†

A. Di Girolamo,30,† B. Di Girolamo,30,† A. Di Mattia,152,† B. Di Micco,134a,134b,† R. Di Nardo,47,† A. Di Simone,48,†

R. Di Sipio,158,† D. Di Valentino,29,† C. Diaconu,85,† M. Diamond,158,† F. A. Dias,46,† M. A. Diaz,32a,† E. B. Diehl,89,†

J. Dietrich,16,† S. Diglio,85,† A. Dimitrievska,13,† J. Dingfelder,21,† P. Dita,26a,† S. Dita,26a,† F. Dittus,30,† F. Djama,85,†

T. Djobava,51b,† J. I. Djuvsland,58a,† M. A. B. do Vale,24c,† D. Dobos,30,† M. Dobre,26a,† C. Doglioni,49,† T. Dohmae,155,†

J. Dolejsi,129,† Z. Dolezal,129,† B. A. Dolgoshein,98,a,† M. Donadelli,24d,† S. Donati,124a,124b,† P. Dondero,121a,121b,†

J. Donini,34,† J. Dopke,131,† A. Doria,104a,† M. T. Dova,71,† A. T. Doyle,53,† E. Drechsler,54,† M. Dris,10,† E. Dubreuil,34,†

E. Duchovni,172,† G. Duckeck,100,† O. A. Ducu,26a,85,† D. Duda,175,† A. Dudarev,30,† L. Duflot,117,† L. Duguid,77,†

M. Dührssen,30,† M. Dunford,58a,† H. Duran Yildiz,4a,† M. Düren,52,† A. Durglishvili,51b,† D. Duschinger,44,† M. Dyndal,38a,†

C. Eckardt,42,† K.M. Ecker,101,† R. C. Edgar,89,† W. Edson,2,† N. C. Edwards,46,† W. Ehrenfeld,21,† T. Eifert,30,† G. Eigen,14,†

K. Einsweiler,15,† T. Ekelof,166,† M. El Kacimi,135c,† M. Ellert,166,† S. Elles,5,† F. Ellinghaus,83,† A. A. Elliot,169,† N. Ellis,30,†

J. Elmsheuser,100,† M. Elsing,30,† D. Emeliyanov,131,† Y. Enari,155,† O. C. Endner,83,† M. Endo,118,† R. Engelmann,148,†

J. Erdmann,43,† A. Ereditato,17,† G. Ernis,175,† J. Ernst,2,† M. Ernst,25,† S. Errede,165,† E. Ertel,83,† M. Escalier,117,† H. Esch,43,†

C. Escobar,125,† B. Esposito,47,†A. I. Etienvre,136,† E. Etzion,153,†H. Evans,61,†A. Ezhilov,123,† L. Fabbri,20a,20b,†G. Facini,31,†

R.M. Fakhrutdinov,130,† S. Falciano,132a,† R. J. Falla,78,† J. Faltova,129,† Y. Fang,33a,† M. Fanti,91a,91b,† A. Farbin,8,†

A. Farilla,134a,† T. Farooque,12,† S. Farrell,15,† S. M. Farrington,170,† P. Farthouat,30,† F. Fassi,135e,† P. Fassnacht,30,†

D. Fassouliotis,9,† M. Faucci Giannelli,77,† A. Favareto,50a,50b,† L. Fayard,117,† P. Federic,144a,† O. L. Fedin,123,n,†

W. Fedorko,168,† S. Feigl,30,† L. Feligioni,85,† C. Feng,33d,† E. J. Feng,6,† H. Feng,89,† A. B. Fenyuk,130,†

P. Fernandez Martinez,167,† S. Fernandez Perez,30,† S. Ferrag,53,† J. Ferrando,53,†A. Ferrari,166,† P. Ferrari,107,† R. Ferrari,121a,†

D. E. Ferreira de Lima,53,† A. Ferrer,167,† D. Ferrere,49,† C. Ferretti,89,† A. Ferretto Parodi,50a,50b,† M. Fiascaris,31,†

F. Fiedler,83,† A. Filipčič,75,† M. Filipuzzi,42,† F. Filthaut,106,† M. Fincke-Keeler,169,† K. D. Finelli,150,†

M. C. N. Fiolhais,126a,126c,† L. Fiorini,167,† A. Firan,40,† A. Fischer,2,† C. Fischer,12,† J. Fischer,175,† W. C. Fisher,90,†

E. A. Fitzgerald,23,† M. Flechl,48,† I. Fleck,141,† P. Fleischmann,89,† S. Fleischmann,175,† G. T. Fletcher,139,† G. Fletcher,76,†

T. Flick,175,† A. Floderus,81,† L. R. Flores Castillo,60a,† M. J. Flowerdew,101,† A. Formica,136,† A. Forti,84,† D. Fournier,117,†

H. Fox,72,† S. Fracchia,12,† P. Francavilla,80,† M. Franchini,20a,20b,† D. Francis,30,† L. Franconi,119,† M. Franklin,57,†

M. Fraternali,121a,121b,† D. Freeborn,78,† S. T. French,28,† F. Friedrich,44,† D. Froidevaux,30,† J. A. Frost,120,† C. Fukunaga,156,†

E. Fullana Torregrosa,83,† B. G. Fulsom,143,† J. Fuster,167,† C. Gabaldon,55,† O. Gabizon,175,† A. Gabrielli,20a,20b,†

A. Gabrielli,132a,132b,† S. Gadatsch,107,† S. Gadomski,49,† G. Gagliardi,50a,50b,† P. Gagnon,61,† C. Galea,106,†

B. Galhardo,126a,126c,† E. J. Gallas,120,† B. J. Gallop,131,† P. Gallus,128,† G. Galster,36,† K. K. Gan,111,† J. Gao,33b,85,† Y. Gao,46,†

Y. S. Gao,143,f,† F. M. Garay Walls,46,† F. Garberson,176,† C. García,167,† J. E. García Navarro,167,† M. Garcia-Sciveres,15,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-11

R.W. Gardner,31,† N. Garelli,143,† V. Garonne,119,† C. Gatti,47,† A. Gaudiello,50a,50b,† G. Gaudio,121a,† B. Gaur,141,†

L. Gauthier,95,† P. Gauzzi,132a,132b,† I. L. Gavrilenko,96,† C. Gay,168,† G. Gaycken,21,† E. N. Gazis,10,† P. Ge,33d,† Z. Gecse,168,†

C. N. P. Gee,131,† D. A. A. Geerts,107,† Ch. Geich-Gimbel,21,† M. P. Geisler,58a,† C. Gemme,50a,† M. H. Genest,55,†

S. Gentile,132a,132b,† M. George,54,† S. George,77,† D. Gerbaudo,163,† A. Gershon,153,† H. Ghazlane,135b,† B. Giacobbe,20a,†

S. Giagu,132a,132b,† V. Giangiobbe,12,† P. Giannetti,124a,124b,† B. Gibbard,25,† S. M. Gibson,77,† M. Gilchriese,15,†

T. P. S. Gillam,28,† D. Gillberg,30,† G. Gilles,34,† D.M. Gingrich,3,e,† N. Giokaris,9,† M. P. Giordani,164a,164c,† F. M. Giorgi,20a,†

F.M. Giorgi,16,† P. F. Giraud,136,† P. Giromini,47,† D. Giugni,91a,† C. Giuliani,48,† M. Giulini,58b,† B. K. Gjelsten,119,†

S. Gkaitatzis,154,† I. Gkialas,154,† E. L. Gkougkousis,117,† L. K. Gladilin,99,† C. Glasman,82,† J. Glatzer,30,†

P. C. F. Glaysher,46,† A. Glazov,42,† M. Goblirsch-Kolb,101,† J. R. Goddard,76,† J. Godlewski,39,† S. Goldfarb,89,†

T. Golling,49,† D. Golubkov,130,† A. Gomes,126a,126b,126d,† R. Gonçalo,126a,† J. Goncalves Pinto Firmino Da Costa,136,†

L. Gonella,21,† S. González de la Hoz,167,† G. Gonzalez Parra,12,† S. Gonzalez-Sevilla,49,† L. Goossens,30,†

P. A. Gorbounov,97,† H. A. Gordon,25,† I. Gorelov,105,† B. Gorini,30,† E. Gorini,73a,73b,† A. Gorišek,75,† E. Gornicki,39,†

A. T. Goshaw,45,† C. Gössling,43,† M. I. Gostkin,65,† D. Goujdami,135c,† A. G. Goussiou,138,† N. Govender,145b,†

H.M. X. Grabas,137,† L. Graber,54,† I. Grabowska-Bold,38a,† P. Grafström,20a,20b,† K-J. Grahn,42,† J. Gramling,49,†

E. Gramstad,119,† S. Grancagnolo,16,† V. Grassi,148,† V. Gratchev,123,† H.M. Gray,30,† E. Graziani,134a,† Z. D. Greenwood,79,o,†

K. Gregersen,78,† I. M. Gregor,42,† P. Grenier,143,† J. Griffiths,8,† A. A. Grillo,137,† K. Grimm,72,† S. Grinstein,12,p,†

Ph. Gris,34,† J.-F. Grivaz,117,† J. P. Grohs,44,† A. Grohsjean,42,† E. Gross,172,† J. Grosse-Knetter,54,† G. C. Grossi,79,†

Z. J. Grout,149,† L. Guan,33b,† J. Guenther,128,† F. Guescini,49,† D. Guest,176,† O. Gueta,153,† E. Guido,50a,50b,† T. Guillemin,117,†

S. Guindon,2,† U. Gul,53,† C. Gumpert,44,† J. Guo,33e,† S. Gupta,120,† P. Gutierrez,113,† N. G. Gutierrez Ortiz,53,†

C. Gutschow,44,† C. Guyot,136,† C. Gwenlan,120,† C. B. Gwilliam,74,† A. Haas,110,† C. Haber,15,† H. K. Hadavand,8,†

N. Haddad,135e,† P. Haefner,21,† S. Hageböck,21,† Z. Hajduk,39,† H. Hakobyan,177,† M. Haleem,42,† J. Haley,114,† D. Hall,120,†

G. Halladjian,90,† G. D. Hallewell,85,† K. Hamacher,175,† P. Hamal,115,† K. Hamano,169,† M. Hamer,54,† A. Hamilton,145a,†

G. N. Hamity,145c,† P. G. Hamnett,42,† L. Han,33b,† K. Hanagaki,118,† K. Hanawa,155,† M. Hance,15,† P. Hanke,58a,†

R. Hanna,136,† J. B. Hansen,36,† J. D. Hansen,36,† M. C. Hansen,21,† P. H. Hansen,36,† K. Hara,160,† A. S. Hard,173,†

T. Harenberg,175,† F. Hariri,117,† S. Harkusha,92,† R. D. Harrington,46,† P. F. Harrison,170,† F. Hartjes,107,† M. Hasegawa,67,†

S. Hasegawa,103,† Y. Hasegawa,140,† A. Hasib,113,† S. Hassani,136,† S. Haug,17,† R. Hauser,90,† L. Hauswald,44,†

M. Havranek,127,† C.M. Hawkes,18,† R. J. Hawkings,30,† A. D. Hawkins,81,† T. Hayashi,160,† D. Hayden,90,† C. P. Hays,120,†

J. M. Hays,76,† H. S. Hayward,74,† S. J. Haywood,131,† S. J. Head,18,† T. Heck,83,† V. Hedberg,81,† L. Heelan,8,† S. Heim,122,†

T. Heim,175,† B. Heinemann,15,† L. Heinrich,110,† J. Hejbal,127,† L. Helary,22,† S. Hellman,146a,146b,† D. Hellmich,21,†

C. Helsens,30,† J. Henderson,120,† R. C.W. Henderson,72,† Y. Heng,173,† C. Hengler,42,† A. Henrichs,176,†

A.M. Henriques Correia,30,† S. Henrot-Versille,117,† G. H. Herbert,16,† Y. Hernández Jiménez,167,† R. Herrberg-Schubert,16,†

G. Herten,48,† R. Hertenberger,100,† L. Hervas,30,† G. G. Hesketh,78,† N. P. Hessey,107,† J. W. Hetherly,40,† R. Hickling,76,†

E. Higón-Rodriguez,167,† E. Hill,169,† J. C. Hill,28,† K. H. Hiller,42,† S. J. Hillier,18,† I. Hinchliffe,15,† E. Hines,122,†

R. R. Hinman,15,† M. Hirose,157,† D. Hirschbuehl,175,† J. Hobbs,148,† N. Hod,107,† M. C. Hodgkinson,139,† P. Hodgson,139,†

A. Hoecker,30,† M. R. Hoeferkamp,105,† F. Hoenig,100,† M. Hohlfeld,83,† D. Hohn,21,† T. R. Holmes,15,† T. M. Hong,122,†

L. Hooft van Huysduynen,110,† W. H. Hopkins,116,† Y. Horii,103,† A. J. Horton,142,† J-Y. Hostachy,55,† S. Hou,151,†

A. Hoummada,135a,† J. Howard,120,† J. Howarth,42,† M. Hrabovsky,115,† I. Hristova,16,† J. Hrivnac,117,† T. Hryn’ova,5,†

A. Hrynevich,93,† C. Hsu,145c,† P. J. Hsu,151,q,† S.-C. Hsu,138,† D. Hu,35,† Q. Hu,33b,† X. Hu,89,† Y. Huang,42,† Z. Hubacek,30,†

F. Hubaut,85,† F. Huegging,21,† T. B. Huffman,120,† E.W. Hughes,35,† G. Hughes,72,† M. Huhtinen,30,† T. A. Hülsing,83,†

N. Huseynov,65,c,† J. Huston,90,† J. Huth,57,† G. Iacobucci,49,† G. Iakovidis,25,† I. Ibragimov,141,† L. Iconomidou-Fayard,117,†

E. Ideal,176,† Z. Idrissi,135e,† P. Iengo,30,† O. Igonkina,107,† T. Iizawa,171,† Y. Ikegami,66,† K. Ikematsu,141,† M. Ikeno,66,†

Y. Ilchenko,31,r,† D. Iliadis,154,† N. Ilic,143,† Y. Inamaru,67,† T. Ince,101,† P. Ioannou,9,† M. Iodice,134a,† K. Iordanidou,35,†

V. Ippolito,57,† A. Irles Quiles,167,† C. Isaksson,166,† M. Ishino,68,† M. Ishitsuka,157,† R. Ishmukhametov,111,† C. Issever,120,†

S. Istin,19a,† J. M. Iturbe Ponce,84,† R. Iuppa,133a,133b,† J. Ivarsson,81,† W. Iwanski,39,† H. Iwasaki,66,† J. M. Izen,41,†

V. Izzo,104a,† S. Jabbar,3,† B. Jackson,122,† M. Jackson,74,† P. Jackson,1,† M. R. Jaekel,30,† V. Jain,2,† K. Jakobs,48,†

S. Jakobsen,30,† T. Jakoubek,127,† J. Jakubek,128,† D. O. Jamin,151,† D. K. Jana,79,† E. Jansen,78,† R.W. Jansky,62,†

J. Janssen,21,† M. Janus,170,† G. Jarlskog,81,† N. Javadov,65,c,† T. Javůrek,48,† L. Jeanty,15,† J. Jejelava,51a,s,† G.-Y. Jeng,150,†

D. Jennens,88,† P. Jenni,48,t,† J. Jentzsch,43,† C. Jeske,170,† S. Jézéquel,5,† H. Ji,173,† J. Jia,148,† Y. Jiang,33b,† S. Jiggins,78,†

J. Jimenez Pena,167,† S. Jin,33a,† A. Jinaru,26a,† O. Jinnouchi,157,† M. D. Joergensen,36,† P. Johansson,139,† K. A. Johns,7,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-12

K. Jon-And,146a,146b,† G. Jones,170,† R.W. L. Jones,72,† T. J. Jones,74,† J. Jongmanns,58a,† P. M. Jorge,126a,126b,† K. D. Joshi,84,†

J. Jovicevic,159a,† X. Ju,173,† C. A. Jung,43,† P. Jussel,62,† A. Juste Rozas,12,p,† M. Kaci,167,† A. Kaczmarska,39,† M. Kado,117,†

H. Kagan,111,† M. Kagan,143,† S. J. Kahn,85,† E. Kajomovitz,45,† C.W. Kalderon,120,† S. Kama,40,† A. Kamenshchikov,130,†

N. Kanaya,155,† M. Kaneda,30,† S. Kaneti,28,† V. A. Kantserov,98,† J. Kanzaki,66,† B. Kaplan,110,† A. Kapliy,31,† D. Kar,53,†

K. Karakostas,10,† A. Karamaoun,3,† N. Karastathis,10,107,† M. J. Kareem,54,† M. Karnevskiy,83,† S. N. Karpov,65,†

Z.M. Karpova,65,† K. Karthik,110,† V. Kartvelishvili,72,† A. N. Karyukhin,130,† L. Kashif,173,† R. D. Kass,111,† A. Kastanas,14,†

Y. Kataoka,155,† A. Katre,49,† J. Katzy,42,† K. Kawagoe,70,† T. Kawamoto,155,† G. Kawamura,54,† S. Kazama,155,†

V. F. Kazanin,109,d,† M. Y. Kazarinov,65,† R. Keeler,169,† R. Kehoe,40,† J. S. Keller,42,† J. J. Kempster,77,† H. Keoshkerian,84,†

O. Kepka,127,† B. P. Kerševan,75,† S. Kersten,175,† R. A. Keyes,87,† F. Khalil-zada,11,† H. Khandanyan,146a,146b,†

A. Khanov,114,† A. G. Kharlamov,109,d,† T. J. Khoo,28,† V. Khovanskiy,97,† E. Khramov,65,† J. Khubua,51b,u,† H. Y. Kim,8,†

H. Kim,146a,146b,† S. H. Kim,160,† Y. Kim,31,† N. Kimura,154,† O.M. Kind,16,† B. T. King,74,† M. King,167,† R. S. B. King,120,†

S. B. King,168,† J. Kirk,131,† A. E. Kiryunin,101,† T. Kishimoto,67,† D. Kisielewska,38a,† F. Kiss,48,† K. Kiuchi,160,†

O. Kivernyk,136,† E. Kladiva,144b,† M. H. Klein,35,† M. Klein,74,† U. Klein,74,† K. Kleinknecht,83,† P. Klimek,146a,146b,†

A. Klimentov,25,† R. Klingenberg,43,† J. A. Klinger,84,† T. Klioutchnikova,30,† E.-E. Kluge,58a,† P. Kluit,107,† S. Kluth,101,†

E. Kneringer,62,† E. B. F. G. Knoops,85,† A. Knue,53,† A. Kobayashi,155,† D. Kobayashi,157,† T. Kobayashi,155,† M. Kobel,44,†

M. Kocian,143,† P. Kodys,129,† T. Koffas,29,† E. Koffeman,107,† L. A. Kogan,120,† S. Kohlmann,175,† Z. Kohout,128,†

T. Kohriki,66,† T. Koi,143,† H. Kolanoski,16,† I. Koletsou,5,† A. A. Komar,96,a,† Y. Komori,155,† T. Kondo,66,†

N. Kondrashova,42,† K. Köneke,48,† A. C. König,106,† S. König,83,† T. Kono,66,v,† R. Konoplich,110,w,† N. Konstantinidis,78,†

R. Kopeliansky,152,† S. Koperny,38a,† L. Köpke,83,† A. K. Kopp,48,† K. Korcyl,39,† K. Kordas,154,† A. Korn,78,†

A. A. Korol,109,d,† I. Korolkov,12,† E. V. Korolkova,139,† O. Kortner,101,† S. Kortner,101,† T. Kosek,129,† V. V. Kostyukhin,21,†

V.M. Kotov,65,† A. Kotwal,45,† A. Kourkoumeli-Charalampidi,154,† C. Kourkoumelis,9,† V. Kouskoura,25,†

A. Koutsman,159a,† R. Kowalewski,169,† T. Z. Kowalski,38a,† W. Kozanecki,136,† A. S. Kozhin,130,† V. A. Kramarenko,99,†

G. Kramberger,75,† D. Krasnopevtsev,98,† A. Krasznahorkay,30,† J. K. Kraus,21,† A. Kravchenko,25,† S. Kreiss,110,†

M. Kretz,58c,† J. Kretzschmar,74,† K. Kreutzfeldt,52,† P. Krieger,158,† K. Krizka,31,† K. Kroeninger,43,† H. Kroha,101,†

J. Kroll,122,† J. Kroseberg,21,† J. Krstic,13,† U. Kruchonak,65,† H. Krüger,21,† N. Krumnack,64,† Z. V. Krumshteyn,65,†

A. Kruse,173,† M. C. Kruse,45,† M. Kruskal,22,† T. Kubota,88,† H. Kucuk,78,† S. Kuday,4b,† S. Kuehn,48,† A. Kugel,58c,†

F. Kuger,174,† A. Kuhl,137,† T. Kuhl,42,† V. Kukhtin,65,† Y. Kulchitsky,92,† S. Kuleshov,32b,† M. Kuna,132a,132b,† T. Kunigo,68,†

A. Kupco,127,† H. Kurashige,67,† Y. A. Kurochkin,92,† R. Kurumida,67,† V. Kus,127,† E. S. Kuwertz,169,† M. Kuze,157,†

J. Kvita,115,† T. Kwan,169,† D. Kyriazopoulos,139,† A. La Rosa,49,† J. L. La Rosa Navarro,24d,† L. La Rotonda,37a,37b,†

C. Lacasta,167,† F. Lacava,132a,132b,† J. Lacey,29,† H. Lacker,16,† D. Lacour,80,† V. R. Lacuesta,167,† E. Ladygin,65,† R. Lafaye,5,†

B. Laforge,80,† T. Lagouri,176,† S. Lai,48,† L. Lambourne,78,† S. Lammers,61,† C. L. Lampen,7,† W. Lampl,7,† E. Lançon,136,†

U. Landgraf,48,† M. P. J. Landon,76,† V. S. Lang,58a,† J. C. Lange,12,† A. J. Lankford,163,† F. Lanni,25,† K. Lantzsch,30,†

S. Laplace,80,† C. Lapoire,30,† J. F. Laporte,136,† T. Lari,91a,† F. Lasagni Manghi,20a,20b,† M. Lassnig,30,† P. Laurelli,47,†

W. Lavrijsen,15,† A. T. Law,137,† P. Laycock,74,† O. Le Dortz,80,† E. Le Guirriec,85,† E. Le Menedeu,12,† M. LeBlanc,169,†

T. LeCompte,6,† F. Ledroit-Guillon,55,† C. A. Lee,145b,† S. C. Lee,151,† L. Lee,1,† G. Lefebvre,80,† M. Lefebvre,169,†

F. Legger,100,† C. Leggett,15,† A. Lehan,74,† G. Lehmann Miotto,30,† X. Lei,7,† W. A. Leight,29,† A. Leisos,154,†

A. G. Leister,176,† M. A. L. Leite,24d,† R. Leitner,129,† D. Lellouch,172,† B. Lemmer,54,† K. J. C. Leney,78,† T. Lenz,21,†

B. Lenzi,30,† R. Leone,7,† S. Leone,124a,124b,† C. Leonidopoulos,46,† S. Leontsinis,10,† C. Leroy,95,† C. G. Lester,28,†

M. Levchenko,123,† J. Levêque,5,† D. Levin,89,† L. J. Levinson,172,† M. Levy,18,† A. Lewis,120,† A.M. Leyko,21,†

M. Leyton,41,† B. Li,33b,x,† H. Li,148,† H. L. Li,31,† L. Li,45,† L. Li,33e,† S. Li,45,† Y. Li,33c,y,† Z. Liang,137,† H. Liao,34,†

B. Liberti,133a,† A. Liblong,158,† P. Lichard,30,† K. Lie,165,† J. Liebal,21,† W. Liebig,14,† C. Limbach,21,† A. Limosani,150,†

S. C. Lin,151,z,† T. H. Lin,83,† F. Linde,107,† B. E. Lindquist,148,† J. T. Linnemann,90,† E. Lipeles,122,† A. Lipniacka,14,†

M. Lisovyi,58b,† T. M. Liss,165,† D. Lissauer,25,† A. Lister,168,† A.M. Litke,137,† B. Liu,151,aa,† D. Liu,151,† J. Liu,85,†

J. B. Liu,33b,† K. Liu,85,† L. Liu,165,† M. Liu,45,† M. Liu,33b,† Y. Liu,33b,† M. Livan,121a,121b,† A. Lleres,55,†

J. Llorente Merino,82,† S. L. Lloyd,76,† F. Lo Sterzo,151,† E. Lobodzinska,42,† P. Loch,7,† W. S. Lockman,137,†

F. K. Loebinger,84,† A. E. Loevschall-Jensen,36,† A. Loginov,176,† T. Lohse,16,† K. Lohwasser,42,† M. Lokajicek,127,†

B. A. Long,22,† J. D. Long,89,† R. E. Long,72,† K. A. Looper,111,† L. Lopes,126a,† D. Lopez Mateos,57,† B. Lopez Paredes,139,†

I. Lopez Paz,12,† J. Lorenz,100,† N. Lorenzo Martinez,61,† M. Losada,162,† P. Loscutoff,15,† P. J. Lösel,100,† X. Lou,33a,†

A. Lounis,117,† J. Love,6,† P. A. Love,72,† N. Lu,89,† H. J. Lubatti,138,† C. Luci,132a,132b,† A. Lucotte,55,† F. Luehring,61,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-13

W. Lukas,62,† L. Luminari,132a,† O. Lundberg,146a,146b,† B. Lund-Jensen,147,† D. Lynn,25,† R. Lysak,127,† E. Lytken,81,†

H. Ma,25,† L. L. Ma,33d,† G. Maccarrone,47,† A. Macchiolo,101,† C.M. Macdonald,139,† J. Machado Miguens,122,126b,†

D. Macina,30,† D. Madaffari,85,† R. Madar,34,† H. J. Maddocks,72,† W. F. Mader,44,† A. Madsen,166,† S. Maeland,14,†

T. Maeno,25,† A. Maevskiy,99,† E. Magradze,54,† K. Mahboubi,48,† J. Mahlstedt,107,† C. Maiani,136,† C. Maidantchik,24a,†

A. A. Maier,101,† T. Maier,100,† A. Maio,126a,126b,126d,† S. Majewski,116,† Y. Makida,66,† N. Makovec,117,† B. Malaescu,80,†

Pa. Malecki,39,† V. P. Maleev,123,† F. Malek,55,† U. Mallik,63,† D. Malon,6,† C. Malone,143,† S. Maltezos,10,†

V.M. Malyshev,109,† S. Malyukov,30,† J. Mamuzic,42,† G. Mancini,47,† B. Mandelli,30,† L. Mandelli,91a,† I. Mandić,75,†

R. Mandrysch,63,† J. Maneira,126a,126b,† A. Manfredini,101,† L. Manhaes de Andrade Filho,24b,† J. Manjarres Ramos,159b,†

A. Mann,100,† P.M. Manning,137,† A. Manousakis-Katsikakis,9,† B. Mansoulie,136,† R. Mantifel,87,† M. Mantoani,54,†

L. Mapelli,30,† L. March,145c,†G. Marchiori,80,†M.Marcisovsky,127,† C. P. Marino,169,†M.Marjanovic,13,† F. Marroquim,24a,†

S. P. Marsden,84,† Z. Marshall,15,† L. F. Marti,17,† S. Marti-Garcia,167,† B. Martin,90,† T. A. Martin,170,† V. J. Martin,46,†

B. Martin dit Latour,14,† M. Martinez,12,p,† S. Martin-Haugh,131,† V. S. Martoiu,26a,† A. C. Martyniuk,78,† M. Marx,138,†

F. Marzano,132a,† A. Marzin,30,† L. Masetti,83,† T. Mashimo,155,† R. Mashinistov,96,† J. Masik,84,† A. L. Maslennikov,109,d,†

I. Massa,20a,20b,† L. Massa,20a,20b,† N. Massol,5,† P. Mastrandrea,148,† A. Mastroberardino,37a,37b,† T. Masubuchi,155,†

P. Mättig,175,† J. Mattmann,83,† J. Maurer,26a,† S. J. Maxfield,74,† D. A. Maximov,109,d,† R. Mazini,151,† S. M. Mazza,91a,91b,†

L. Mazzaferro,133a,133b,† G. Mc Goldrick,158,† S. P. Mc Kee,89,† A. McCarn,89,† R. L. McCarthy,148,† T. G. McCarthy,29,†

N. A. McCubbin,131,† K.W. McFarlane,56,a,† J. A. Mcfayden,78,† G. Mchedlidze,54,† S. J. McMahon,131,†

R. A. McPherson,169,l,† M. Medinnis,42,† S. Meehan,145a,† S. Mehlhase,100,† A. Mehta,74,† K. Meier,58a,† C. Meineck,100,†

B. Meirose,41,† B. R. Mellado Garcia,145c,† F. Meloni,17,† A. Mengarelli,20a,20b,† S. Menke,101,† E. Meoni,161,†

K.M. Mercurio,57,† S. Mergelmeyer,21,† P. Mermod,49,† L. Merola,104a,104b,† C. Meroni,91a,† F. S. Merritt,31,†

A. Messina,132a,132b,† J. Metcalfe,25,† A. S. Mete,163,† C. Meyer,83,† C. Meyer,122,† J-P. Meyer,136,† J. Meyer,107,†

R. P. Middleton,131,† S. Miglioranzi,164a,164c,† L. Mijović,21,† G. Mikenberg,172,† M. Mikestikova,127,† M. Mikuž,75,†

M. Milesi,88,† A. Milic,30,† D.W. Miller,31,† C. Mills,46,† A. Milov,172,† D. A. Milstead,146a,146b,† A. A. Minaenko,130,†

Y. Minami,155,† I. A. Minashvili,65,† A. I. Mincer,110,† B. Mindur,38a,† M. Mineev,65,† Y. Ming,173,† L.M. Mir,12,†

T. Mitani,171,† J. Mitrevski,100,† V. A. Mitsou,167,† A. Miucci,49,† P. S. Miyagawa,139,† J. U. Mjörnmark,81,† T. Moa,146a,146b,†

K. Mochizuki,85,† S. Mohapatra,35,† W. Mohr,48,† S. Molander,146a,146b,† R. Moles-Valls,167,† K. Mönig,42,† C. Monini,55,†

J. Monk,36,† E. Monnier,85,† J. Montejo Berlingen,12,† F. Monticelli,71,† S. Monzani,132a,132b,† R.W. Moore,3,†

N. Morange,117,† D. Moreno,162,† M. Moreno Llácer,54,† P. Morettini,50a,† M. Morgenstern,44,† M. Morii,57,†

M. Morinaga,155,† V. Morisbak,119,† S. Moritz,83,† A. K. Morley,147,† G. Mornacchi,30,† J. D. Morris,76,† S. S. Mortensen,36,†

A. Morton,53,† L. Morvaj,103,† M. Mosidze,51b,† J. Moss,111,† K. Motohashi,157,† R. Mount,143,† E. Mountricha,25,†

S. V. Mouraviev,96,a,† E. J. W. Moyse,86,† S. Muanza,85,† R. D. Mudd,18,† F. Mueller,101,† J. Mueller,125,† K. Mueller,21,†

R. S. P. Mueller,100,† T. Mueller,28,† D. Muenstermann,49,† P. Mullen,53,† Y. Munwes,153,† J. A. Murillo Quijada,18,†

W. J. Murray,170,131,† H. Musheghyan,54,† E. Musto,152,† A. G. Myagkov,130,bb,† M. Myska,128,† O. Nackenhorst,54,†

J. Nadal,54,† K. Nagai,120,† R. Nagai,157,† Y. Nagai,85,† K. Nagano,66,† A. Nagarkar,111,† Y. Nagasaka,59,† K. Nagata,160,†

M. Nagel,101,† E. Nagy,85,† A.M. Nairz,30,† Y. Nakahama,30,† K. Nakamura,66,† T. Nakamura,155,† I. Nakano,112,†

H. Namasivayam,41,† R. F. Naranjo Garcia,42,† R. Narayan,31,† T. Naumann,42,† G. Navarro,162,† R. Nayyar,7,† H. A. Neal,89,†

P.Yu. Nechaeva,96,† T. J. Neep,84,† P. D. Nef,143,† A. Negri,121a,121b,† M. Negrini,20a,† S. Nektarijevic,106,† C. Nellist,117,†

A. Nelson,163,† S. Nemecek,127,† P. Nemethy,110,† A. A. Nepomuceno,24a,† M. Nessi,30,cc,† M. S. Neubauer,165,†

M. Neumann,175,† R.M. Neves,110,† P. Nevski,25,† P. R. Newman,18,† D. H. Nguyen,6,† R. B. Nickerson,120,†

R. Nicolaidou,136,† B. Nicquevert,30,† J. Nielsen,137,† N. Nikiforou,35,† A. Nikiforov,16,† V. Nikolaenko,130,bb,†

I. Nikolic-Audit,80,† K. Nikolopoulos,18,† J. K. Nilsen,119,† P. Nilsson,25,† Y. Ninomiya,155,† A. Nisati,132a,† R. Nisius,101,†

T. Nobe,157,† M. Nomachi,118,† I. Nomidis,29,† T. Nooney,76,† S. Norberg,113,† M. Nordberg,30,† O. Novgorodova,44,†

S. Nowak,101,† M. Nozaki,66,† L. Nozka,115,† K. Ntekas,10,† G. Nunes Hanninger,88,† T. Nunnemann,100,† E. Nurse,78,†

F. Nuti,88,† B. J. O’Brien,46,† F. O’grady,7,† D. C. O’Neil,142,† V. O’Shea,53,† F. G. Oakham,29,e,† H. Oberlack,101,†

T. Obermann,21,† J. Ocariz,80,† A. Ochi,67,† I. Ochoa,78,† J. P. Ochoa-Ricoux,32a,† S. Oda,70,† S. Odaka,66,† H. Ogren,61,†

A. Oh,84,† S. H. Oh,45,† C. C. Ohm,15,† H. Ohman,166,† H. Oide,30,† W. Okamura,118,† H. Okawa,160,† Y. Okumura,31,†

T. Okuyama,155,† A. Olariu,26a,† S. A. Olivares Pino,46,† D. Oliveira Damazio,25,† E. Oliver Garcia,167,† A. Olszewski,39,†

J. Olszowska,39,† A. Onofre,126a,126e,† P. U. E. Onyisi,31,r,† C. J. Oram,159a,† M. J. Oreglia,31,† Y. Oren,153,†

D. Orestano,134a,134b,† N. Orlando,154,† C. Oropeza Barrera,53,† R. S. Orr,158,† B. Osculati,50a,50b,† R. Ospanov,84,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-14

G. Otero y Garzon,27,† H. Otono,70,† M. Ouchrif,135d,† E. A. Ouellette,169,† F. Ould-Saada,119,† A. Ouraou,136,†

K. P. Oussoren,107,† Q. Ouyang,33a,† A. Ovcharova,15,† M. Owen,53,† R. E. Owen,18,† V. E. Ozcan,19a,† N. Ozturk,8,†

K. Pachal,142,† A. Pacheco Pages,12,† C. Padilla Aranda,12,† M. Pagáčová,48,† S. Pagan Griso,15,† E. Paganis,139,† C. Pahl,101,†

F. Paige,25,† P. Pais,86,† K. Pajchel,119,† G. Palacino,159b,† S. Palestini,30,† M. Palka,38b,† D. Pallin,34,† A. Palma,126a,126b,†

Y. B. Pan,173,† E. Panagiotopoulou,10,† C. E. Pandini,80,† J. G. Panduro Vazquez,77,† P. Pani,146a,146b,† S. Panitkin,25,†

D. Pantea,26a,† L. Paolozzi,49,† Th.D. Papadopoulou,10,† K. Papageorgiou,154,† A. Paramonov,6,† D. Paredes Hernandez,154,†

M. A. Parker,28,† K. A. Parker,139,† F. Parodi,50a,50b,† J. A. Parsons,35,† U. Parzefall,48,† E. Pasqualucci,132a,† S. Passaggio,50a,†

F. Pastore,134a,134b,a,† Fr. Pastore,77,† G. Pásztor,29,† S. Pataraia,175,† N. D. Patel,150,† J. R. Pater,84,† T. Pauly,30,† J. Pearce,169,†

B. Pearson,113,† L. E. Pedersen,36,† M. Pedersen,119,† S. Pedraza Lopez,167,† R. Pedro,126a,126b,† S. V. Peleganchuk,109,†

D. Pelikan,166,† H. Peng,33b,† B. Penning,31,† J. Penwell,61,† D. V. Perepelitsa,25,† E. Perez Codina,159a,†

M. T. Pérez García-Estañ,167,† L. Perini,91a,91b,† H. Pernegger,30,† S. Perrella,104a,104b,† R. Peschke,42,† V. D. Peshekhonov,65,†

K. Peters,30,† R. F. Y. Peters,84,† B. A. Petersen,30,† T. C. Petersen,36,† E. Petit,42,† A. Petridis,146a,146b,† C. Petridou,154,†

E. Petrolo,132a,† F. Petrucci,134a,134b,† N. E. Pettersson,157,† R. Pezoa,32b,† P.W. Phillips,131,† G. Piacquadio,143,† E. Pianori,170,†

A. Picazio,49,† E. Piccaro,76,† M. Piccinini,20a,20b,† M. A. Pickering,120,† R. Piegaia,27,† D. T. Pignotti,111,† J. E. Pilcher,31,†

A. D. Pilkington,84,† J. Pina,126a,126b,126d,† M. Pinamonti,164a,164c,dd,† J. L. Pinfold,3,† A. Pingel,36,† B. Pinto,126a,† S. Pires,80,†

M. Pitt,172,† C. Pizio,91a,91b,† L. Plazak,144a,† M.-A. Pleier,25,† V. Pleskot,129,† E. Plotnikova,65,† P. Plucinski,146a,146b,†

D. Pluth,64,† R. Poettgen,83,† L. Poggioli,117,† D. Pohl,21,† G. Polesello,121a,† A. Policicchio,37a,37b,† R. Polifka,158,†

A. Polini,20a,† C. S. Pollard,53,† V. Polychronakos,25,† K. Pommès,30,† L. Pontecorvo,132a,† B. G. Pope,90,†

G. A. Popeneciu,26b,† D. S. Popovic,13,† A. Poppleton,30,† S. Pospisil,128,† K. Potamianos,15,† I. N. Potrap,65,† C. J. Potter,149,†

C. T. Potter,116,† G. Poulard,30,† J. Poveda,30,† V. Pozdnyakov,65,† P. Pralavorio,85,† A. Pranko,15,† S. Prasad,30,† S. Prell,64,†

D. Price,84,† L. E. Price,6,† M. Primavera,73a,† S. Prince,87,† M. Proissl,46,† K. Prokofiev,60c,† F. Prokoshin,32b,†

E. Protopapadaki,136,† S. Protopopescu,25,† J. Proudfoot,6,† M. Przybycien,38a,† E. Ptacek,116,† D. Puddu,134a,134b,†

E. Pueschel,86,† D. Puldon,148,† M. Purohit,25,ee,† P. Puzo,117,† J. Qian,89,† G. Qin,53,† Y. Qin,84,† A. Quadt,54,†

D. R. Quarrie,15,† W. B. Quayle,164a,164b,† M. Queitsch-Maitland,84,† D. Quilty,53,† S. Raddum,119,† V. Radeka,25,†

V. Radescu,42,† S. K. Radhakrishnan,148,† P. Radloff,116,† P. Rados,88,† F. Ragusa,91a,91b,† G. Rahal,178,† S. Rajagopalan,25,†

M. Rammensee,30,† C. Rangel-Smith,166,† F. Rauscher,100,† S. Rave,83,† T. Ravenscroft,53,† M. Raymond,30,† A. L. Read,119,†

N. P. Readioff,74,† D.M. Rebuzzi,121a,121b,† A. Redelbach,174,† G. Redlinger,25,† R. Reece,137,† K. Reeves,41,† L. Rehnisch,16,†

H. Reisin,27,† M. Relich,163,† C. Rembser,30,† H. Ren,33a,† A. Renaud,117,† M. Rescigno,132a,† S. Resconi,91a,†

O. L. Rezanova,109,d,† P. Reznicek,129,† R. Rezvani,95,† R. Richter,101,† S. Richter,78,† E. Richter-Was,38b,† O. Ricken,21,†

M. Ridel,80,† P. Rieck,16,† C. J. Riegel,175,† J. Rieger,54,† M. Rijssenbeek,148,† A. Rimoldi,121a,121b,† L. Rinaldi,20a,†

B. Ristić,49,† E. Ritsch,62,† I. Riu,12,† F. Rizatdinova,114,† E. Rizvi,76,† S. H. Robertson,87,l,† A. Robichaud-Veronneau,87,†

D. Robinson,28,† J. E. M. Robinson,84,† A. Robson,53,† C. Roda,124a,124b,† S. Roe,30,† O. Røhne,119,† S. Rolli,161,†

A. Romaniouk,98,† M. Romano,20a,20b,† S.M. Romano Saez,34,† E. Romero Adam,167,† N. Rompotis,138,† M. Ronzani,48,†

L. Roos,80,† E. Ros,167,† S. Rosati,132a,† K. Rosbach,48,† P. Rose,137,† P. L. Rosendahl,14,† O. Rosenthal,141,†

V. Rossetti,146a,146b,† E. Rossi,104a,104b,† L. P. Rossi,50a,† R. Rosten,138,† M. Rotaru,26a,† I. Roth,172,† J. Rothberg,138,†

D. Rousseau,117,† C. R. Royon,136,† A. Rozanov,85,† Y. Rozen,152,† X. Ruan,145c,† F. Rubbo,143,† I. Rubinskiy,42,† V. I. Rud,99,†

C. Rudolph,44,†M. S. Rudolph,158,† F. Rühr,48,†A. Ruiz-Martinez,30,† Z. Rurikova,48,†N. A. Rusakovich,65,†A. Ruschke,100,†

H. L. Russell,138,† J. P. Rutherfoord,7,† N. Ruthmann,48,† Y. F. Ryabov,123,† M. Rybar,129,† G. Rybkin,117,† N. C. Ryder,120,†

A. F. Saavedra,150,† G. Sabato,107,† S. Sacerdoti,27,† A. Saddique,3,† H. F-W. Sadrozinski,137,† R. Sadykov,65,†

F. Safai Tehrani,132a,† M. Saimpert,136,† H. Sakamoto,155,† Y. Sakurai,171,† G. Salamanna,134a,134b,† A. Salamon,133a,†

M. Saleem,113,† D. Salek,107,† P. H. Sales De Bruin,138,† D. Salihagic,101,† A. Salnikov,143,† J. Salt,167,† D. Salvatore,37a,37b,†

F. Salvatore,149,† A. Salvucci,106,† A. Salzburger,30,† D. Sampsonidis,154,† A. Sanchez,104a,104b,† J. Sánchez,167,†

V. Sanchez Martinez,167,† H. Sandaker,14,† R. L. Sandbach,76,† H. G. Sander,83,† M. P. Sanders,100,† M. Sandhoff,175,†

C. Sandoval,162,† R. Sandstroem,101,† D. P. C. Sankey,131,† M. Sannino,50a,50b,† A. Sansoni,47,† C. Santoni,34,†

R. Santonico,133a,133b,† H. Santos,126a,† I. Santoyo Castillo,149,† K. Sapp,125,† A. Sapronov,65,† J. G. Saraiva,126a,126d,†

B. Sarrazin,21,† O. Sasaki,66,† Y. Sasaki,155,† K. Sato,160,† G. Sauvage,5,a,† E. Sauvan,5,† G. Savage,77,† P. Savard,158,e,†

C. Sawyer,120,† L. Sawyer,79,o,† J. Saxon,31,† C. Sbarra,20a,† A. Sbrizzi,20a,20b,† T. Scanlon,78,† D. A. Scannicchio,163,†

M. Scarcella,150,† V. Scarfone,37a,37b,† J. Schaarschmidt,172,† P. Schacht,101,† D. Schaefer,30,† R. Schaefer,42,† J. Schaeffer,83,†

S. Schaepe,21,† S. Schaetzel,58b,† U. Schäfer,83,† A. C. Schaffer,117,† D. Schaile,100,† R. D. Schamberger,148,† V. Scharf,58a,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-15

V. A. Schegelsky,123,† D. Scheirich,129,† M. Schernau,163,† C. Schiavi,50a,50b,† C. Schillo,48,† M. Schioppa,37a,37b,†

S. Schlenker,30,† E. Schmidt,48,† K. Schmieden,30,† C. Schmitt,83,† S. Schmitt,58b,† S. Schmitt,42,† B. Schneider,159a,†

Y. J. Schnellbach,74,† U. Schnoor,44,† L. Schoeffel,136,† A. Schoening,58b,† B. D. Schoenrock,90,† E. Schopf,21,†

A. L. S. Schorlemmer,54,† M. Schott,83,† D. Schouten,159a,† J. Schovancova,8,† S. Schramm,158,† M. Schreyer,174,†

C. Schroeder,83,† N. Schuh,83,† M. J. Schultens,21,† H.-C. Schultz-Coulon,58a,† H. Schulz,16,† M. Schumacher,48,†

B. A. Schumm,137,† Ph. Schune,136,† C. Schwanenberger,84,† A. Schwartzman,143,† T. A. Schwarz,89,† Ph. Schwegler,101,†

Ph. Schwemling,136,† R. Schwienhorst,90,† J. Schwindling,136,† T. Schwindt,21,† M. Schwoerer,5,† F. G. Sciacca,17,†

E. Scifo,117,† G. Sciolla,23,† F. Scuri,124a,124b,† F. Scutti,21,† J. Searcy,89,† G. Sedov,42,† E. Sedykh,123,† P. Seema,21,†

S. C. Seidel,105,† A. Seiden,137,† F. Seifert,128,† J. M. Seixas,24a,† G. Sekhniaidze,104a,† K. Sekhon,89,† S. J. Sekula,40,†

K. E. Selbach,46,† D.M. Seliverstov,123,a,† N. Semprini-Cesari,20a,20b,† C. Serfon,30,† L. Serin,117,† L. Serkin,164a,164b,†

T. Serre,85,† M. Sessa,134a,134b,† R. Seuster,159a,† H. Severini,113,† T. Sfiligoj,75,† F. Sforza,101,† A. Sfyrla,30,† E. Shabalina,54,†

M. Shamim,116,† L. Y. Shan,33a,† R. Shang,165,† J. T. Shank,22,† M. Shapiro,15,† P. B. Shatalov,97,† K. Shaw,164a,164b,†

S. M. Shaw,84,†A. Shcherbakova,146a,146b,† C. Y. Shehu,149,† P. Sherwood,78,† L. Shi,151,ff,† S. Shimizu,67,† C. O. Shimmin,163,†

M. Shimojima,102,† M. Shiyakova,65,† A. Shmeleva,96,† D. Shoaleh Saadi,95,† M. J. Shochet,31,† S. Shojaii,91a,91b,†

S. Shrestha,111,† E. Shulga,98,† M. A. Shupe,7,† S. Shushkevich,42,† P. Sicho,127,† O. Sidiropoulou,174,† D. Sidorov,114,†

A. Sidoti,20a,20b,† F. Siegert,44,† Dj. Sijacki,13,† J. Silva,126a,126d,† Y. Silver,153,† S. B. Silverstein,146a,† V. Simak,128,†

O. Simard,5,† Lj. Simic,13,† S. Simion,117,† E. Simioni,83,† B. Simmons,78,†D. Simon,34,† R. Simoniello,91a,91b,† P. Sinervo,158,†

N. B. Sinev,116,† G. Siragusa,174,† A. N. Sisakyan,65,a,† S.Yu. Sivoklokov,99,† J. Sjölin,146a,146b,† T. B. Sjursen,14,†

M. B. Skinner,72,† H. P. Skottowe,57,† P. Skubic,113,† M. Slater,18,† T. Slavicek,128,† M. Slawinska,107,† K. Sliwa,161,†

V. Smakhtin,172,† B. H. Smart,46,† L. Smestad,14,† S.Yu. Smirnov,98,† Y. Smirnov,98,† L. N. Smirnova,99,gg,† O. Smirnova,81,†

M. N. K. Smith,35,† R.W. Smith,35,† M. Smizanska,72,† K. Smolek,128,† A. A. Snesarev,96,† G. Snidero,76,† S. Snyder,25,†

R. Sobie,169,l,† F. Socher,44,† A. Soffer,153,† D. A. Soh,151,ff,† C. A. Solans,30,† M. Solar,128,† J. Solc,128,† E.Yu. Soldatov,98,†

U. Soldevila,167,† A. A. Solodkov,130,† A. Soloshenko,65,† O. V. Solovyanov,130,† V. Solovyev,123,† P. Sommer,48,†

H. Y. Song,33b,† N. Soni,1,† A. Sood,15,† A. Sopczak,128,† B. Sopko,128,† V. Sopko,128,† V. Sorin,12,† D. Sosa,58b,†

M. Sosebee,8,† C. L. Sotiropoulou,124a,124b,† R. Soualah,164a,164c,† P. Soueid,95,† A.M. Soukharev,109,d,† D. South,42,†

B. C. Sowden,77,† S. Spagnolo,73a,73b,† M. Spalla,124a,124b,† F. Spanò,77,† W. R. Spearman,57,† F. Spettel,101,† R. Spighi,20a,†

G. Spigo,30,† L. A. Spiller,88,† M. Spousta,129,† T. Spreitzer,158,† R. D. St. Denis,53,a,† S. Staerz,44,† J. Stahlman,122,†

R. Stamen,58a,† S. Stamm,16,† E. Stanecka,39,† C. Stanescu,134a,† M. Stanescu-Bellu,42,† M.M. Stanitzki,42,† S. Stapnes,119,†

E. A. Starchenko,130,† J. Stark,55,† P. Staroba,127,† P. Starovoitov,42,† R. Staszewski,39,† P. Stavina,144a,a,† P. Steinberg,25,†

B. Stelzer,142,† H. J. Stelzer,30,† O. Stelzer-Chilton,159a,† H. Stenzel,52,† S. Stern,101,† G. A. Stewart,53,† J. A. Stillings,21,†

M. C. Stockton,87,† M. Stoebe,87,† G. Stoicea,26a,† P. Stolte,54,† S. Stonjek,101,† A. R. Stradling,8,† A. Straessner,44,†

M. E. Stramaglia,17,† J. Strandberg,147,† S. Strandberg,146a,146b,† A. Strandlie,119,† E. Strauss,143,† M. Strauss,113,†

P. Strizenec,144b,† R. Ströhmer,174,† D.M. Strom,116,† R. Stroynowski,40,† A. Strubig,106,† S. A. Stucci,17,† B. Stugu,14,†

N. A. Styles,42,† D. Su,143,† J. Su,125,† R. Subramaniam,79,† A. Succurro,12,† Y. Sugaya,118,† C. Suhr,108,† M. Suk,128,†

V. V. Sulin,96,† S. Sultansoy,4c,† T. Sumida,68,† S. Sun,57,† X. Sun,33a,† J. E. Sundermann,48,† K. Suruliz,149,†

G. Susinno,37a,37b,† M. R. Sutton,149,† S. Suzuki,66,† Y. Suzuki,66,† M. Svatos,127,† S. Swedish,168,† M. Swiatlowski,143,†

I. Sykora,144a,† T. Sykora,129,† D. Ta,90,† C. Taccini,134a,134b,† K. Tackmann,42,† J. Taenzer,158,† A. Taffard,163,† R. Tafirout,159a,†

N. Taiblum,153,† H. Takai,25,† R. Takashima,69,† H. Takeda,67,† T. Takeshita,140,† Y. Takubo,66,† M. Talby,85,†

A. A. Talyshev,109,d,† J. Y. C. Tam,174,† K. G. Tan,88,† J. Tanaka,155,† R. Tanaka,117,† S. Tanaka,66,† B. B. Tannenwald,111,†

N. Tannoury,21,† S. Tapprogge,83,† S. Tarem,152,† F. Tarrade,29,† G. F. Tartarelli,91a,† P. Tas,129,† M. Tasevsky,127,†

T. Tashiro,68,† E. Tassi,37a,37b,†A. Tavares Delgado,126a,126b,†Y. Tayalati,135d,† F. E. Taylor,94,†G. N. Taylor,88,†W. Taylor,159b,†

F. A. Teischinger,30,† M. Teixeira Dias Castanheira,76,† P. Teixeira-Dias,77,† K. K. Temming,48,† H. Ten Kate,30,†

P. K. Teng,151,† J. J. Teoh,118,† F. Tepel,175,† S. Terada,66,† K. Terashi,155,† J. Terron,82,† S. Terzo,101,† M. Testa,47,†

R. J. Teuscher,158,l,† J. Therhaag,21,† T. Theveneaux-Pelzer,34,† J. P. Thomas,18,† J. Thomas-Wilsker,77,† E. N. Thompson,35,†

P. D. Thompson,18,† R. J. Thompson,84,† A. S. Thompson,53,† L. A. Thomsen,36,† E. Thomson,122,† M. Thomson,28,†

R. P. Thun,89,a,† M. J. Tibbetts,15,† R. E. Ticse Torres,85,† V. O. Tikhomirov,96,hh,† Yu.A. Tikhonov,109,d,† S. Timoshenko,98,†

E. Tiouchichine,85,† P. Tipton,176,† S. Tisserant,85,† T. Todorov,5,a,† S. Todorova-Nova,129,† J. Tojo,70,† S. Tokár,144a,†

K. Tokushuku,66,† K. Tollefson,90,† E. Tolley,57,† L. Tomlinson,84,† M. Tomoto,103,† L. Tompkins,143,ii,† K. Toms,105,†

E. Torrence,116,† H. Torres,142,† E. Torró Pastor,167,† J. Toth,85,jj,† F. Touchard,85,† D. R. Tovey,139,† T. Trefzger,174,†

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-16

L. Tremblet,30,† A. Tricoli,30,† I. M. Trigger,159a,† S. Trincaz-Duvoid,80,† M. F. Tripiana,12,† W. Trischuk,158,† B. Trocmé,55,†

C. Troncon,91a,† M. Trottier-McDonald,15,† M. Trovatelli,134a,134b,† P. True,90,† L. Truong,164a,164c,† M. Trzebinski,39,†

A. Trzupek,39,† C. Tsarouchas,30,† J.C-L. Tseng,120,† P. V. Tsiareshka,92,† D. Tsionou,154,† G. Tsipolitis,10,† N. Tsirintanis,9,†

S. Tsiskaridze,12,† V. Tsiskaridze,48,† E. G. Tskhadadze,51a,† I. I. Tsukerman,97,† V. Tsulaia,15,† S. Tsuno,66,†

D. Tsybychev,148,† A. Tudorache,26a,† V. Tudorache,26a,† A. N. Tuna,122,† S. A. Tupputi,20a,20b,† S. Turchikhin,99,gg,†

D. Turecek,128,† R. Turra,91a,91b,† A. J. Turvey,40,† P. M. Tuts,35,† A. Tykhonov,49,† M. Tylmad,146a,146b,† M. Tyndel,131,†

I. Ueda,155,† R. Ueno,29,† M. Ughetto,146a,146b,† M. Ugland,14,† M. Uhlenbrock,21,† F. Ukegawa,160,† G. Unal,30,†

A. Undrus,25,† G. Unel,163,† F. C. Ungaro,48,† Y. Unno,66,† C. Unverdorben,100,† J. Urban,144b,† P. Urquijo,88,† P. Urrejola,83,†

G. Usai,8,† A. Usanova,62,† L. Vacavant,85,† V. Vacek,128,† B. Vachon,87,† C. Valderanis,83,† N. Valencic,107,†

S. Valentinetti,20a,20b,† A. Valero,167,† L. Valery,12,† S. Valkar,129,† E. Valladolid Gallego,167,† S. Vallecorsa,49,†

J. A. Valls Ferrer,167,† W. Van Den Wollenberg,107,† P. C. Van Der Deijl,107,† R. van der Geer,107,† H. van der Graaf,107,†

R. Van Der Leeuw,107,† N. van Eldik,152,† P. van Gemmeren,6,† J. Van Nieuwkoop,142,† I. van Vulpen,107,†

M. C. van Woerden,30,† M. Vanadia,132a,132b,† W. Vandelli,30,† R. Vanguri,122,† A. Vaniachine,6,† F. Vannucci,80,†

G. Vardanyan,177,† R. Vari,132a,† E.W. Varnes,7,† T. Varol,40,† D. Varouchas,80,† A. Vartapetian,8,† K. E. Varvell,150,†

F. Vazeille,34,† T. Vazquez Schroeder,87,† J. Veatch,7,† L. M. Veloce,158,† F. Veloso,126a,126c,† T. Velz,21,† S. Veneziano,132a,†

A. Ventura,73a,73b,† D. Ventura,86,† M. Venturi,169,† N. Venturi,158,† A. Venturini,23,† V. Vercesi,121a,† M. Verducci,132a,132b,†

W. Verkerke,107,† J. C. Vermeulen,107,† A. Vest,44,† M. C. Vetterli,142,e,† O. Viazlo,81,† I. Vichou,165,† T. Vickey,139,†

O. E. Vickey Boeriu,139,† G. H. A. Viehhauser,120,† S. Viel,15,† R. Vigne,30,† M. Villa,20a,20b,† M. Villaplana Perez,91a,91b,†

E. Vilucchi,47,† M. G. Vincter,29,† V. B. Vinogradov,65,† I. Vivarelli,149,† F. Vives Vaque,3,† S. Vlachos,10,† D. Vladoiu,100,†

M. Vlasak,128,† M. Vogel,32a,† P. Vokac,128,† G. Volpi,124a,124b,† M. Volpi,88,† H. von der Schmitt,101,† H. von Radziewski,48,†

E. von Toerne,21,† V. Vorobel,129,† K. Vorobev,98,† M. Vos,167,† R. Voss,30,† J. H. Vossebeld,74,† N. Vranjes,13,†

M. Vranjes Milosavljevic,13,† V. Vrba,127,† M. Vreeswijk,107,† R. Vuillermet,30,† I. Vukotic,31,† Z. Vykydal,128,† P. Wagner,21,†

W. Wagner,175,† H. Wahlberg,71,† S. Wahrmund,44,† J. Wakabayashi,103,† J. Walder,72,† R. Walker,100,† W. Walkowiak,141,†

C. Wang,33c,† F. Wang,173,† H. Wang,15,† H. Wang,40,† J. Wang,42,† J. Wang,33a,† K. Wang,87,† R. Wang,6,† S.M. Wang,151,†

T. Wang,21,† X. Wang,176,† C. Wanotayaroj,116,† A. Warburton,87,† C. P. Ward,28,† D. R. Wardrope,78,† M. Warsinsky,48,†

A. Washbrook,46,† C. Wasicki,42,† P. M. Watkins,18,† A. T. Watson,18,† I. J. Watson,150,† M. F. Watson,18,† G. Watts,138,†

S. Watts,84,† B.M. Waugh,78,† S. Webb,84,† M. S. Weber,17,† S.W. Weber,174,† J. S. Webster,31,† A. R. Weidberg,120,†

B. Weinert,61,† J. Weingarten,54,† C. Weiser,48,† H. Weits,107,† P. S. Wells,30,† T. Wenaus,25,† T. Wengler,30,† S. Wenig,30,†

N. Wermes,21,† M. Werner,48,† P. Werner,30,† M. Wessels,58a,† J. Wetter,161,† K. Whalen,29,† A.M. Wharton,72,† A. White,8,†

M. J. White,1,† R. White,32b,† S. White,124a,124b,† D. Whiteson,163,† F. J. Wickens,131,† W. Wiedenmann,173,† M. Wielers,131,†

P. Wienemann,21,† C. Wiglesworth,36,† L. A.M. Wiik-Fuchs,21,† A. Wildauer,101,† H. G. Wilkens,30,† H. H. Williams,122,†

S. Williams,107,† C. Willis,90,† S. Willocq,86,† A. Wilson,89,† J. A. Wilson,18,† I. Wingerter-Seez,5,† F. Winklmeier,116,†

B. T. Winter,21,† M. Wittgen,143,† J. Wittkowski,100,† S. J. Wollstadt,83,† M.W. Wolter,39,† H. Wolters,126a,126c,†

B. K. Wosiek,39,† J. Wotschack,30,† M. J. Woudstra,84,† K.W. Wozniak,39,† M. Wu,55,† M. Wu,31,† S. L. Wu,173,† X. Wu,49,†

Y. Wu,89,† T. R. Wyatt,84,† B.M. Wynne,46,† S. Xella,36,† D. Xu,33a,† L. Xu,33b,kk,† B. Yabsley,150,† S. Yacoob,145b,ll,†

R. Yakabe,67,† M. Yamada,66,† Y. Yamaguchi,118,† A. Yamamoto,66,† S. Yamamoto,155,† T. Yamanaka,155,† K. Yamauchi,103,†

Y. Yamazaki,67,† Z. Yan,22,† H. Yang,33e,† H. Yang,173,† Y. Yang,151,† L. Yao,33a,† W-M. Yao,15,† Y. Yasu,66,† E. Yatsenko,5,†

K. H. Yau Wong,21,† J. Ye,40,† S. Ye,25,† I. Yeletskikh,65,† A. L. Yen,57,† E. Yildirim,42,† K. Yorita,171,† R. Yoshida,6,†

K. Yoshihara,122,† C. Young,143,† C. J. S. Young,30,† S. Youssef,22,† D. R. Yu,15,† J. Yu,8,† J. M. Yu,89,† J. Yu,114,† L. Yuan,67,†

A. Yurkewicz,108,† I. Yusuff,28,mm,† B. Zabinski,39,† R. Zaidan,63,† A.M. Zaitsev,130,bb,† J. Zalieckas,14,† A. Zaman,148,†

S. Zambito,57,† L. Zanello,132a,132b,† D. Zanzi,88,† C. Zeitnitz,175,† M. Zeman,128,† A. Zemla,38a,† K. Zengel,23,† O. Zenin,130,†

T. Ženiš,144a,† D. Zerwas,117,† D. Zhang,89,† F. Zhang,173,† J. Zhang,6,† L. Zhang,48,† R. Zhang,33b,† X. Zhang,33d,†

Z. Zhang,117,† X. Zhao,40,† Y. Zhao,33d,117,† Z. Zhao,33b,† A. Zhemchugov,65,† J. Zhong,120,† B. Zhou,89,† C. Zhou,45,†

L. Zhou,35,† L. Zhou,40,† N. Zhou,163,† C. G. Zhu,33d,† H. Zhu,33a,† J. Zhu,89,† Y. Zhu,33b,† X. Zhuang,33a,† K. Zhukov,96,†

A. Zibell,174,† D. Zieminska,61,† N. I. Zimine,65,† C. Zimmermann,83,† S. Zimmermann,48,† Z. Zinonos,54,† M. Zinser,83,†

M. Ziolkowski,141,† L. Živković,13,† G. Zobernig,173,† A. Zoccoli,20a,20b,† M. zur Nedden,16,† G. Zurzolo,104a,104b,†

L. Zwalinski,30,† V. Khachatryan,179,‡ A.M. Sirunyan,179,‡ A. Tumasyan,179,‡ W. Adam,180,‡ E. Asilar,180,‡ T. Bergauer,180,‡

J. Brandstetter,180,‡ E. Brondolin,180,‡ M. Dragicevic,180,‡ J. Erö,180,‡ M. Flechl,180,‡ M. Friedl,180,‡ R. Frühwirth,180,nn,‡

V.M. Ghete,180,‡ C. Hartl,180,‡ N. Hörmann,180,‡ J. Hrubec,180,‡ M. Jeitler,180,nn,‡ V. Knünz,180,‡ A. König,180,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-17

M. Krammer,180,nn,‡ I. Krätschmer,180,‡ D. Liko,180,‡ T. Matsushita,180,‡ I. Mikulec,180,‡ D. Rabady,180,oo,‡ B. Rahbaran,180,‡

H. Rohringer,180,‡ J. Schieck,180,nn,‡ R. Schöfbeck,180,‡ J. Strauss,180,‡ W. Treberer-Treberspurg,180,‡ W. Waltenberger,180,‡

C.-E. Wulz,180,nn,‡ V. Mossolov,181,‡ N. Shumeiko,181,‡ J. Suarez Gonzalez,181,‡ S. Alderweireldt,182,‡ T. Cornelis,182,‡

E. A. De Wolf,182,‡ X. Janssen,182,‡ A. Knutsson,182,‡ J. Lauwers,182,‡ S. Luyckx,182,‡ S. Ochesanu,182,‡ R. Rougny,182,‡

M. Van De Klundert,182,‡ H. Van Haevermaet,182,‡ P. Van Mechelen,182,‡ N. Van Remortel,182,‡ A. Van Spilbeeck,182,‡

S. Abu Zeid,183,‡ F. Blekman,183,‡ J. D’Hondt,183,‡ N. Daci,183,‡ I. De Bruyn,183,‡ K. Deroover,183,‡ N. Heracleous,183,‡

J. Keaveney,183,‡ S. Lowette,183,‡ L. Moreels,183,‡ A. Olbrechts,183,‡ Q. Python,183,‡ D. Strom,183,‡ S. Tavernier,183,‡

W. Van Doninck,183,‡ P. Van Mulders,183,‡ G. P. Van Onsem,183,‡ I. Van Parijs,183,‡ P. Barria,184,‡ C. Caillol,184,‡

B. Clerbaux,184,‡ G. De Lentdecker,184,‡ H. Delannoy,184,‡ D. Dobur,184,‡ G. Fasanella,184,‡ L. Favart,184,‡ A. P. R. Gay,184,‡

A. Grebenyuk,184,‡ T. Lenzi,184,‡ A. Léonard,184,‡ T. Maerschalk,184,‡ A. Mohammadi,184,‡ L. Perniè,184,‡

A. Randle-conde,184,‡ T. Reis,184,‡ T. Seva,184,‡ L. Thomas,184,‡ C. Vander Velde,184,‡ P. Vanlaer,184,‡ J. Wang,184,‡

R. Yonamine,184,‡ F. Zenoni,184,‡ F. Zhang,184,pp,‡ K. Beernaert,185,‡ L. Benucci,185,‡ A. Cimmino,185,‡ S. Crucy,185,‡

A. Fagot,185,‡ G. Garcia,185,‡ M. Gul,185,‡ J. Mccartin,185,‡ A. A. Ocampo Rios,185,‡ D. Poyraz,185,‡ D. Ryckbosch,185,‡

S. Salva Diblen,185,‡ M. Sigamani,185,‡ N. Strobbe,185,‡ M. Tytgat,185,‡ W. Van Driessche,185,‡ E. Yazgan,185,‡

N. Zaganidis,185,‡ S. Basegmez,186,‡ C. Beluffi,186,qq,‡ O. Bondu,186,‡ G. Bruno,186,‡ R. Castello,186,‡ A. Caudron,186,‡

L. Ceard,186,‡ G. G. Da Silveira,186,‡ C. Delaere,186,‡ D. Favart,186,‡ L. Forthomme,186,‡ A. Giammanco,186,rr,‡ J. Hollar,186,‡

A. Jafari,186,‡ P. Jez,186,‡ M. Komm,186,‡ V. Lemaitre,186,‡ A. Mertens,186,‡ C. Nuttens,186,‡ L. Perrini,186,‡ A. Pin,186,‡

K. Piotrzkowski,186,‡ A. Popov,186,ss,‡ L. Quertenmont,186,‡ M. Selvaggi,186,‡ M. Vidal Marono,186,‡ N. Beliy,187,‡

T. Caebergs,187,‡ G. H. Hammad,187,‡ W. L. Aldá Júnior,188,‡ G. A. Alves,188,‡ L. Brito,188,‡ M. Correa Martins Junior,188,‡

T. Dos Reis Martins,188,‡ C. Hensel,188,‡ C. Mora Herrera,188,‡ A. Moraes,188,‡ M. E. Pol,188,‡ P. Rebello Teles,188,‡

E. Belchior Batista Das Chagas,189,‡ W. Carvalho,189,‡ J. Chinellato,189,tt,‡ A. Custódio,189,‡ E. M. Da Costa,189,‡

D. De Jesus Damiao,189,‡ C. De Oliveira Martins,189,‡ S. Fonseca De Souza,189,‡ L.M. Huertas Guativa,189,‡

H. Malbouisson,189,‡ D. Matos Figueiredo,189,‡ L. Mundim,189,‡ H. Nogima,189,‡ W. L. Prado Da Silva,189,‡ A. Santoro,189,‡

A. Sznajder,189,‡ E. J. Tonelli Manganote,189,tt,‡ A. Vilela Pereira,189,‡ S. Ahuja,190a,‡ C. A. Bernardes,190b,‡

A. De Souza Santos,190b,‡ S. Dogra,190a,‡ T. R. Fernandez Perez Tomei,190a,‡ E. M. Gregores,190b,‡ P. G. Mercadante,190b,‡

C. S. Moon,190a,uu,‡ S. F. Novaes,190a,‡ Sandra S. Padula,190a,‡ D. Romero Abad,190a,‡ J. C. Ruiz Vargas,190a,‡

A. Aleksandrov,191,‡ V. Genchev,191,oo,‡ R. Hadjiiska,191,‡ P. Iaydjiev,191,‡ A. Marinov,191,‡ S. Piperov,191,‡ M. Rodozov,191,‡

S. Stoykova,191,‡ G. Sultanov,191,‡ M. Vutova,191,‡ A. Dimitrov,192,‡ I. Glushkov,192,‡ L. Litov,192,‡ B. Pavlov,192,‡

P. Petkov,192,‡ M. Ahmad,193,‡ J. G. Bian,193,‡ G.M. Chen,193,‡ H. S. Chen,193,‡ M. Chen,193,‡ T. Cheng,193,‡ R. Du,193,‡

C. H. Jiang,193,‡ R. Plestina,193,vv,‡ F. Romeo,193,‡ S.M. Shaheen,193,‡ J. Tao,193,‡ C. Wang,193,‡ Z. Wang,193,‡ H. Zhang,193,‡

C. Asawatangtrakuldee,194,‡ Y. Ban,194,‡ G. Chen,194,‡ Q. Li,194,‡ S. Liu,194,‡ Y. Mao,194,‡ S. J. Qian,194,‡ D. Wang,194,‡

M. Wang,194,‡ Q. Wang,194,‡ Z. Xu,194,‡ D. Yang,194,‡ Z. Zhang,194,‡ W. Zou,194,‡ C. Avila,195,‡ A. Cabrera,195,‡

L. F. Chaparro Sierra,195,‡ C. Florez,195,‡ J. P. Gomez,195,‡ B. Gomez Moreno,195,‡ J. C. Sanabria,195,‡ N. Godinovic,196,‡

D. Lelas,196,‡ D. Polic,196,‡ I. Puljak,196,‡ Z. Antunovic,197,‡ M. Kovac,197,‡ V. Brigljevic,198,‡ K. Kadija,198,‡ J. Luetic,198,‡

L. Sudic,198,‡ A. Attikis,199,‡ G. Mavromanolakis,199,‡ J. Mousa,199,‡ C. Nicolaou,199,‡ F. Ptochos,199,‡ P. A. Razis,199,‡

H. Rykaczewski,199,‡ M. Bodlak,200,‡ M. Finger,200,ww,‡ M. Finger Jr.,200,ww,‡ A. Ali,201,xx,yy,‡ R. Aly,201,zz,‡ S. Aly,201,zz,‡

Y. Assran,201,aaa,‡ A. Ellithi Kamel,201,bbb,‡ A. Lotfy,201,ccc,‡ M. A. Mahmoud,201,ccc,‡ R. Masod,201,xx,‡ A. Radi,201,yy,xx,‡

B. Calpas,202,‡ M. Kadastik,202,‡ M. Murumaa,202,‡ M. Raidal,202,‡ A. Tiko,202,‡ C. Veelken,202,‡ P. Eerola,203,‡

J. Pekkanen,203,‡ M. Voutilainen,203,‡ J. Härkönen,204,‡ V. Karimäki,204,‡ R. Kinnunen,204,‡ T. Lampén,204,‡

K. Lassila-Perini,204,‡ S. Lehti,204,‡ T. Lindén,204,‡ P. Luukka,204,‡ T. Mäenpää,204,‡ T. Peltola,204,‡ E. Tuominen,204,‡

J. Tuominiemi,204,‡ E. Tuovinen,204,‡ L. Wendland,204,‡ J. Talvitie,205,‡ T. Tuuva,205,‡ M. Besancon,206,‡ F. Couderc,206,‡

M. Dejardin,206,‡ D. Denegri,206,‡ B. Fabbro,206,‡ J. L. Faure,206,‡ C. Favaro,206,‡ F. Ferri,206,‡ S. Ganjour,206,‡

A. Givernaud,206,‡ P. Gras,206,‡ G. Hamel de Monchenault,206,‡ P. Jarry,206,‡ E. Locci,206,‡ M. Machet,206,‡ J. Malcles,206,‡

J. Rander,206,‡ A. Rosowsky,206,‡ M. Titov,206,‡ A. Zghiche,206,‡ S. Baffioni,207,‡ F. Beaudette,207,‡ P. Busson,207,‡

L. Cadamuro,207,‡ E. Chapon,207,‡ C. Charlot,207,‡ T. Dahms,207,‡ O. Davignon,207,‡ N. Filipovic,207,‡ A. Florent,207,‡

R. Granier de Cassagnac,207,‡ S. Lisniak,207,‡ L. Mastrolorenzo,207,‡ P. Miné,207,‡ I. N. Naranjo,207,‡ M. Nguyen,207,‡

C. Ochando,207,‡ G. Ortona,207,‡ P. Paganini,207,‡ S. Regnard,207,‡ R. Salerno,207,‡ J. B. Sauvan,207,‡ Y. Sirois,207,‡

T. Strebler,207,‡ Y. Yilmaz,207,‡ A. Zabi,207,‡ J.-L. Agram,208,ddd,‡ J. Andrea,208,‡ A. Aubin,208,‡ D. Bloch,208,‡ J.-M. Brom,208,‡

M. Buttignol,208,‡ E. C. Chabert,208,‡ N. Chanon,208,‡ C. Collard,208,‡ E. Conte,208,ddd,‡ J.-C. Fontaine,208,ddd,‡ D. Gelé,208,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-18

U. Goerlach,208,‡ C. Goetzmann,208,‡ A.-C. Le Bihan,208,‡ J. A. Merlin,208,oo,‡ K. Skovpen,208,‡ P. Van Hove,208,‡

S. Gadrat,209,‡ S. Beauceron,210,‡ C. Bernet,210,‡G. Boudoul,210,‡ E. Bouvier,210,‡ S. Brochet,210,‡ C. A. Carrillo Montoya,210,‡

J. Chasserat,210,‡ R. Chierici,210,‡ D. Contardo,210,‡ B. Courbon,210,‡ P. Depasse,210,‡ H. El Mamouni,210,‡ J. Fan,210,‡

J. Fay,210,‡ S. Gascon,210,‡ M. Gouzevitch,210,‡ B. Ille,210,‡ I. B. Laktineh,210,‡ M. Lethuillier,210,‡ L. Mirabito,210,‡

A. L. Pequegnot,210,‡ S. Perries,210,‡ J. D. Ruiz Alvarez,210,‡ D. Sabes,210,‡ L. Sgandurra,210,‡ V. Sordini,210,‡

M. Vander Donckt,210,‡ P. Verdier,210,‡ S. Viret,210,‡ H. Xiao,210,‡ Z. Tsamalaidze,211,ww,‡ C. Autermann,212,‡ S. Beranek,212,‡

M. Bontenackels,212,‡ M. Edelhoff,212,‡ L. Feld,212,‡ A. Heister,212,‡ M. K. Kiesel,212,‡ K. Klein,212,‡ M. Lipinski,212,‡

A. Ostapchuk,212,‡ M. Preuten,212,‡ F. Raupach,212,‡ J. Sammet,212,‡ S. Schael,212,‡ J. F. Schulte,212,‡ T. Verlage,212,‡

H. Weber,212,‡ B. Wittmer,212,‡ V. Zhukov,212,ss,‡ M. Ata,213,‡ M. Brodski,213,‡ E. Dietz-Laursonn,213,‡ D. Duchardt,213,‡

M. Endres,213,‡ M. Erdmann,213,‡ S. Erdweg,213,‡ T. Esch,213,‡ R. Fischer,213,‡ A. Güth,213,‡ T. Hebbeker,213,‡

C. Heidemann,213,‡K. Hoepfner,213,‡D. Klingebiel,213,‡ S. Knutzen,213,‡ P. Kreuzer,213,‡M.Merschmeyer,213,‡A. Meyer,213,‡

P. Millet,213,‡ M. Olschewski,213,‡ K. Padeken,213,‡ P. Papacz,213,‡ T. Pook,213,‡ M. Radziej,213,‡ H. Reithler,213,‡

M. Rieger,213,‡ F. Scheuch,213,‡ L. Sonnenschein,213,‡ D. Teyssier,213,‡ S. Thüer,213,‡ V. Cherepanov,214,‡ Y. Erdogan,214,‡

G. Flügge,214,‡ H. Geenen,214,‡ M. Geisler,214,‡ W. Haj Ahmad,214,‡ F. Hoehle,214,‡ B. Kargoll,214,‡ T. Kress,214,‡

Y. Kuessel,214,‡ A. Künsken,214,‡ J. Lingemann,214,oo,‡ A. Nehrkorn,214,‡ A. Nowack,214,‡ I. M. Nugent,214,‡ C. Pistone,214,‡

O. Pooth,214,‡ A. Stahl,214,‡ M. Aldaya Martin,215,‡ I. Asin,215,‡ N. Bartosik,215,‡ O. Behnke,215,‡ U. Behrens,215,‡

A. J. Bell,215,‡ K. Borras,215,‡ A. Burgmeier,215,‡ A. Cakir,215,‡ L. Calligaris,215,‡ A. Campbell,215,‡ S. Choudhury,215,‡

F. Costanza,215,‡ C. Diez Pardos,215,‡ G. Dolinska,215,‡ S. Dooling,215,‡ T. Dorland,215,‡ G. Eckerlin,215,‡ D. Eckstein,215,‡

T. Eichhorn,215,‡ G. Flucke,215,‡ E. Gallo,215,‡ J. Garay Garcia,215,‡ A. Geiser,215,‡ A. Gizhko,215,‡ P. Gunnellini,215,‡

J. Hauk,215,‡ M. Hempel,215,eee,‡ H. Jung,215,‡ A. Kalogeropoulos,215,‡ O. Karacheban,215,eee,‡ M. Kasemann,215,‡

P. Katsas,215,‡ J. Kieseler,215,‡ C. Kleinwort,215,‡ I. Korol,215,‡ W. Lange,215,‡ J. Leonard,215,‡ K. Lipka,215,‡ A. Lobanov,215,‡

W. Lohmann,215,eee,‡ R. Mankel,215,‡ I. Marfin,215,eee,‡ I.-A. Melzer-Pellmann,215,‡ A. B. Meyer,215,‡ G. Mittag,215,‡

J. Mnich,215,‡ A. Mussgiller,215,‡ S. Naumann-Emme,215,‡ A. Nayak,215,‡ E. Ntomari,215,‡ H. Perrey,215,‡ D. Pitzl,215,‡

R. Placakyte,215,‡ A. Raspereza,215,‡ P. M. Ribeiro Cipriano,215,‡ B. Roland,215,‡ M. Ö. Sahin,215,‡ J. Salfeld-Nebgen,215,‡

P. Saxena,215,‡ T. Schoerner-Sadenius,215,‡ M. Schröder,215,‡ C. Seitz,215,‡ S. Spannagel,215,‡ K. D. Trippkewitz,215,‡

C. Wissing,215,‡ V. Blobel,216,‡ M. Centis Vignali,216,‡ A. R. Draeger,216,‡ J. Erfle,216,‡ E. Garutti,216,‡ K. Goebel,216,‡

D. Gonzalez,216,‡ M. Görner,216,‡ J. Haller,216,‡ M. Hoffmann,216,‡ R. S. Höing,216,‡ A. Junkes,216,‡ R. Klanner,216,‡

R. Kogler,216,‡ T. Lapsien,216,‡ T. Lenz,216,‡ I. Marchesini,216,‡ D. Marconi,216,‡ D. Nowatschin,216,‡ J. Ott,216,‡

F. Pantaleo,216,oo,‡ T. Peiffer,216,‡ A. Perieanu,216,‡ N. Pietsch,216,‡ J. Poehlsen,216,‡ D. Rathjens,216,‡ C. Sander,216,‡

H. Schettler,216,‡ P. Schleper,216,‡ E. Schlieckau,216,‡ A. Schmidt,216,‡ J. Schwandt,216,‡ M. Seidel,216,‡ V. Sola,216,‡

H. Stadie,216,‡ G. Steinbrück,216,‡ H. Tholen,216,‡ D. Troendle,216,‡ E. Usai,216,‡ L. Vanelderen,216,‡ A. Vanhoefer,216,‡

M. Akbiyik,217,‡ C. Amstutz,217,‡ C. Barth,217,‡ C. Baus,217,‡ J. Berger,217,‡ C. Beskidt,217,‡ C. Böser,217,‡ E. Butz,217,‡

R. Caspart,217,‡ T. Chwalek,217,‡ F. Colombo,217,‡ W. De Boer,217,‡ A. Descroix,217,‡ A. Dierlamm,217,‡ R. Eber,217,‡

M. Feindt,217,‡ S. Fink,217,‡ M. Fischer,217,‡ F. Frensch,217,‡ B. Freund,217,‡ R. Friese,217,‡ D. Funke,217,‡ M. Giffels,217,‡

A. Gilbert,217,‡ D. Haitz,217,‡ T. Harbaum,217,‡ M. A. Harrendorf,217,‡ F. Hartmann,217,oo,‡ U. Husemann,217,‡ F. Kassel,217,oo,‡

I. Katkov,217,ss,‡ A. Kornmayer,217,oo,‡ S. Kudella,217,‡ P. Lobelle Pardo,217,‡ B. Maier,217,‡ H. Mildner,217,‡ M. U. Mozer,217,‡

T. Müller,217,‡ Th. Müller,217,‡ M. Plagge,217,‡ M. Printz,217,‡ G. Quast,217,‡ K. Rabbertz,217,‡ S. Röcker,217,‡ F. Roscher,217,‡

I. Shvetsov,217,‡ G. Sieber,217,‡ H. J. Simonis,217,‡ F. M. Stober,217,‡ R. Ulrich,217,‡ J. Wagner-Kuhr,217,‡ S. Wayand,217,‡

T. Weiler,217,‡ S. Williamson,217,‡ C. Wöhrmann,217,‡ R. Wolf,217,‡ G. Anagnostou,218,‡ G. Daskalakis,218,‡ T. Geralis,218,‡

V. A. Giakoumopoulou,218,‡ A. Kyriakis,218,‡ D. Loukas,218,‡ A. Markou,218,‡ A. Psallidas,218,‡ I. Topsis-Giotis,218,‡

A. Agapitos,219,‡ S. Kesisoglou,219,‡ A. Panagiotou,219,‡ N. Saoulidou,219,‡ E. Tziaferi,219,‡ I. Evangelou,220,‡ G. Flouris,220,‡

C. Foudas,220,‡ P. Kokkas,220,‡ N. Loukas,220,‡ N. Manthos,220,‡ I. Papadopoulos,220,‡ E. Paradas,220,‡ J. Strologas,220,‡

G. Bencze,221,‡ C. Hajdu,221,‡ A. Hazi,221,‡ P. Hidas,221,‡ D. Horvath,221,fff,‡ F. Sikler,221,‡ V. Veszpremi,221,‡

G. Vesztergombi,221,ggg,‡ A. J. Zsigmond,221,‡ N. Beni,222,‡ S. Czellar,222,‡ J. Karancsi,222,hhh,‡ J. Molnar,222,‡ Z. Szillasi,222,‡

M. Bartók,223,iii,‡ A. Makovec,223,‡ P. Raics,223,‡ Z. L. Trocsanyi,223,‡ B. Ujvari,223,‡ P. Mal,224,‡ K. Mandal,224,‡ N. Sahoo,224,‡

S. K. Swain,224,‡ S. Bansal,225,‡ S. B. Beri,225,‡ V. Bhatnagar,225,‡ R. Chawla,225,‡ R. Gupta,225,‡ U. Bhawandeep,225,‡

A. K. Kalsi,225,‡ A. Kaur,225,‡ M. Kaur,225,‡ R. Kumar,225,‡ A. Mehta,225,‡ M. Mittal,225,‡ N. Nishu,225,‡ J. B. Singh,225,‡

G. Walia,225,‡ Ashok Kumar,226,‡ Arun Kumar,226,‡ A. Bhardwaj,226,‡ B. C. Choudhary,226,‡ R. B. Garg,226,‡ A. Kumar,226,‡

S. Malhotra,226,‡ M. Naimuddin,226,‡ K. Ranjan,226,‡ R. Sharma,226,‡ V. Sharma,226,‡ S. Banerjee,227,‡ S. Bhattacharya,227,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-19

K. Chatterjee,227,‡ S. Dey,227,‡ S. Dutta,227,‡ Sa. Jain,227,‡ Sh. Jain,227,‡ R. Khurana,227,‡ N. Majumdar,227,‡ A. Modak,227,‡

K. Mondal,227,‡ S. Mukherjee,227,‡ S. Mukhopadhyay,227,‡ A. Roy,227,‡ D. Roy,227,‡ S. Roy Chowdhury,227,‡ S. Sarkar,227,‡

M. Sharan,227,‡ A. Abdulsalam,228,‡ R. Chudasama,228,‡ D. Dutta,228,‡ V. Jha,228,‡ V. Kumar,228,‡ A. K. Mohanty,228,oo,‡

L.M. Pant,228,‡ P. Shukla,228,‡ A. Topkar,228,‡ T. Aziz,229,‡ S. Banerjee,229,‡ S. Bhowmik,229,jjj,‡ R.M. Chatterjee,229,‡

R. K. Dewanjee,229,‡ S. Dugad,229,‡ S. Ganguly,229,‡ S. Ghosh,229,‡ M. Guchait,229,‡ A. Gurtu,229,kkk,‡ G. Kole,229,‡

S. Kumar,229,‡ B. Mahakud,229,‡ M. Maity,229,jjj,‡ G. Majumder,229,‡ K. Mazumdar,229,‡ S. Mitra,229,‡ G. B. Mohanty,229,‡

B. Parida,229,‡ T. Sarkar,229,jjj,‡ K. Sudhakar,229,‡ N. Sur,229,‡ B. Sutar,229,‡ N. Wickramage,229,lll,‡ S. Sharma,230,‡

H. Bakhshiansohi,231,‡ H. Behnamian,231,‡ S. M. Etesami,231,mmm,‡ A. Fahim,231,nnn,‡ R. Goldouzian,231,‡ M. Khakzad,231,‡

M. Mohammadi Najafabadi,231,‡ M. Naseri,231,‡ S. Paktinat Mehdiabadi,231,‡ F. Rezaei Hosseinabadi,231,‡

B. Safarzadeh,231,ooo,‡ M. Zeinali,231,‡ M. Felcini,232,‡ M. Grunewald,232,‡ M. Abbrescia,233a,233b,‡ C. Calabria,233a,233b,‡

C. Caputo,233a,233b,‡ S. S. Chhibra,233a,233b,‡ A. Colaleo,233a,‡ D. Creanza,233a,233c,‡ L. Cristella,233a,233b,‡

N. De Filippis,233a,233c,‡ M. De Palma,233a,233b,‡ L. Fiore,233a,‡ G. Iaselli,233a,233c,‡ G. Maggi,233a,233c,‡ M. Maggi,233a,‡

G. Miniello,233a,233b,‡ S. My,233a,233c,‡ S. Nuzzo,233a,233b,‡ A. Pompili,233a,233b,‡ G. Pugliese,233a,233c,‡ R. Radogna,233a,233b,‡

A. Ranieri,233a,‡ G. Selvaggi,233a,233b,‡ L. Silvestris,233a,oo,‡ R. Venditti,233a,233b,‡ P. Verwilligen,233a,‡ G. Abbiendi,234a,‡

C. Battilana,234a,oo,‡ A. C. Benvenuti,234a,‡ D. Bonacorsi,234a,234b,‡ S. Braibant-Giacomelli,234a,234b,‡ L. Brigliadori,234a,234b,‡

R. Campanini,234a,234b,‡ P. Capiluppi,234a,234b,‡ A. Castro,234a,234b,‡ F. R. Cavallo,234a,‡ G. Codispoti,234a,234b,‡

M. Cuffiani,234a,234b,‡ G.M. Dallavalle,234a,‡ F. Fabbri,234a,‡ A. Fanfani,234a,234b,‡ D. Fasanella,234a,234b,‡ P. Giacomelli,234a,‡

C. Grandi,234a,‡ L. Guiducci,234a,234b,‡ S. Marcellini,234a,‡ G. Masetti,234a,‡ A. Montanari,234a,‡ F. L. Navarria,234a,234b,‡

A. Perrotta,234a,‡ A.M. Rossi,234a,234b,‡ T. Rovelli,234a,234b,‡ G. P. Siroli,234a,234b,‡ N. Tosi,234a,234b,‡ R. Travaglini,234a,234b,‡

G. Cappello,235a,‡ M. Chiorboli,235a,235b,‡ S. Costa,235a,235b,‡ F. Giordano,235a,‡ R. Potenza,235a,235b,‡ A. Tricomi,235a,235b,‡

C. Tuve,235a,235b,‡ G. Barbagli,236a,‡ V. Ciulli,236a,236b,‡ C. Civinini,236a,‡ R. D’Alessandro,236a,236b,‡ E. Focardi,236a,236b,‡

S. Gonzi,236a,236b,‡ V. Gori,236a,236b,‡ P. Lenzi,236a,236b,‡ M. Meschini,236a,‡ S. Paoletti,236a,‡ G. Sguazzoni,236a,‡

A. Tropiano,236a,236b,‡ L. Viliani,236a,236b,‡ L. Benussi,237,‡ S. Bianco,237,‡ F. Fabbri,237,‡ D. Piccolo,237,‡ V. Calvelli,238a,238b,‡

F. Ferro,238a,‡ M. Lo Vetere,238a,238b,‡ E. Robutti,238a,‡ S. Tosi,238a,238b,‡ M. E. Dinardo,239a,239b,‡ S. Fiorendi,239a,239b,‡

S. Gennai,239a,‡ R. Gerosa,239a,239b,‡ A. Ghezzi,239a,239b,‡ P. Govoni,239a,239b,‡ S. Malvezzi,239a,‡ R. A. Manzoni,239a,239b,‡

B. Marzocchi,239a,239b,oo,‡ D. Menasce,239a,‡ L. Moroni,239a,‡ M. Paganoni,239a,239b,‡ D. Pedrini,239a,‡ S. Ragazzi,239a,239b,‡

N. Redaelli,239a,‡ T. Tabarelli de Fatis,239a,239b,‡ S. Buontempo,240a,‡ N. Cavallo,240a,240c,‡ S. Di Guida,240a,240d,oo,‡

M. Esposito,240a,240b,‡ F. Fabozzi,240a,240c,‡ A. O. M. Iorio,240a,240b,‡ G. Lanza,240a,‡ L. Lista,240a,‡ S. Meola,240a,240d,oo,‡

M. Merola,240a,‡ P. Paolucci,240a,oo,‡ C. Sciacca,240a,240b,‡ F. Thyssen,240a,‡ P. Azzi,241a,oo,‡ N. Bacchetta,241a,‡

D. Bisello,241a,241b,‡ A. Branca,241a,241b,‡ R. Carlin,241a,241b,‡ A. Carvalho Antunes De Oliveira,241a,241b,‡ P. Checchia,241a,‡

M. Dall’Osso,241a,241b,oo,‡ T. Dorigo,241a,‡ U. Dosselli,241a,‡ F. Gasparini,241a,241b,‡ U. Gasparini,241a,241b,‡ A. Gozzelino,241a,‡

K. Kanishchev,241a,241c,‡ S. Lacaprara,241a,‡ M. Margoni,241a,241b,‡ A. T. Meneguzzo,241a,241b,‡ J. Pazzini,241a,241b,‡

N. Pozzobon,241a,241b,‡ P. Ronchese,241a,241b,‡ F. Simonetto,241a,241b,‡ E. Torassa,241a,‡ M. Tosi,241a,241b,‡ M. Zanetti,241a,‡

P. Zotto,241a,241b,‡ A. Zucchetta,241a,241b,oo,‡ G. Zumerle,241a,241b,‡ A. Braghieri,242a,‡ M. Gabusi,242a,242b,‡ A. Magnani,242a,‡

S. P. Ratti,242a,242b,‡ V. Re,242a,‡ C. Riccardi,242a,242b,‡ P. Salvini,242a,‡ I. Vai,242a,‡ P. Vitulo,242a,242b,‡

L. Alunni Solestizi,243a,243b,‡ M. Biasini,243a,243b,‡ G.M. Bilei,243a,‡ D. Ciangottini,243a,243b,oo,‡ L. Fanò,243a,243b,‡

P. Lariccia,243a,243b,‡ G. Mantovani,243a,243b,‡ M. Menichelli,243a,‡ A. Saha,243a,‡ A. Santocchia,243a,243b,‡ A. Spiezia,243a,243b,‡

K. Androsov,244a,ppp,‡ P. Azzurri,244a,‡ G. Bagliesi,244a,‡ J. Bernardini,244a,‡ T. Boccali,244a,‡ G. Broccolo,244a,244c,‡

R. Castaldi,244a,‡ M. A. Ciocci,244a,ppp,‡ R. Dell’Orso,244a,‡ S. Donato,244a,244c,oo,‡ G. Fedi,244a,‡ L. Foà,244a,244c,,‡

A. Giassi,244a,‡ M. T. Grippo,244a,ppp,‡ F. Ligabue,244a,244c,‡ T. Lomtadze,244a,‡ L. Martini,244a,244b,‡ A. Messineo,244a,244b,‡

F. Palla,244a,‡ A. Rizzi,244a,244b,‡ A. Savoy-Navarro,244a,qqq,‡ A. T. Serban,244a,‡ P. Spagnolo,244a,‡ P. Squillacioti,244a,ppp,‡

R. Tenchini,244a,‡ G. Tonelli,244a,244b,‡ A. Venturi,244a,‡ P. G. Verdini,244a,‡ L. Barone,245a,245b,‡ F. Cavallari,245a,‡

G. D’imperio,245a,245b,oo,‡ D. Del Re,245a,245b,‡ M. Diemoz,245a,‡ S. Gelli,245a,245b,‡ C. Jorda,245a,‡ E. Longo,245a,245b,‡

F. Margaroli,245a,245b,‡ P. Meridiani,245a,‡ F. Micheli,245a,245b,‡ G. Organtini,245a,245b,‡ R. Paramatti,245a,‡ F. Preiato,245a,245b,‡

S. Rahatlou,245a,245b,‡ C. Rovelli,245a,‡ F. Santanastasio,245a,245b,‡ P. Traczyk,245a,245b,oo,‡ N. Amapane,246a,246b,‡

R. Arcidiacono,246a,246c,‡ S. Argiro,246a,246b,‡ M. Arneodo,246a,246c,‡ R. Bellan,246a,246b,‡ C. Biino,246a,‡ N. Cartiglia,246a,‡

M. Costa,246a,246b,‡ R. Covarelli,246a,246b,‡ A. Degano,246a,246b,‡ N. Demaria,246a,‡ L. Finco,246a,246b,oo,‡ B. Kiani,246a,246b,‡

C. Mariotti,246a,‡ S. Maselli,246a,‡ E. Migliore,246a,246b,‡ V. Monaco,246a,246b,‡ E. Monteil,246a,246b,‡ M. Musich,246a,‡

M.M. Obertino,246a,246b,‡ L. Pacher,246a,246b,‡ N. Pastrone,246a,‡ M. Pelliccioni,246a,‡ G. L. Pinna Angioni,246a,246b,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-20

F. Ravera,246a,246b,‡ A. Romero,246a,246b,‡ M. Ruspa,246a,246c,‡ R. Sacchi,246a,246b,‡ A. Solano,246a,246b,‡ A. Staiano,246a,‡

U. Tamponi,246a,‡ S. Belforte,247a,‡ V. Candelise,247a,247b,oo,‡ M. Casarsa,247a,‡ F. Cossutti,247a,‡ G. Della Ricca,247a,247b,‡

B. Gobbo,247a,‡ C. La Licata,247a,247b,‡ M. Marone,247a,247b,‡ A. Schizzi,247a,247b,‡ T. Umer,247a,247b,‡ A. Zanetti,247a,‡

S. Chang,248,‡ A. Kropivnitskaya,248,‡ S. K. Nam,248,‡ D. H. Kim,249,‡ G. N. Kim,249,‡ M. S. Kim,249,‡ D. J. Kong,249,‡

S. Lee,249,‡ Y. D. Oh,249,‡ A. Sakharov,249,‡ D. C. Son,249,‡ J. A. Brochero Cifuentes,250,‡ H. Kim,250,‡ T. J. Kim,250,‡

M. S. Ryu,250,‡ S. Song,251,‡ S. Choi,252,‡ Y. Go,252,‡ D. Gyun,252,‡ B. Hong,252,‡ M. Jo,252,‡ H. Kim,252,‡ Y. Kim,252,‡

B. Lee,252,‡ K. Lee,252,‡ K. S. Lee,252,‡ S. Lee,252,‡ S. K. Park,252,‡ Y. Roh,252,‡ H. D. Yoo,253,‡ M. Choi,254,‡ J. H. Kim,254,‡

J. S. H. Lee,254,‡ I. C. Park,254,‡ G. Ryu,254,‡ Y. Choi,255,‡ Y. K. Choi,255,‡ J. Goh,255,‡ D. Kim,255,‡ E. Kwon,255,‡ J. Lee,255,‡

I. Yu,255,‡ A. Juodagalvis,256,‡ J. Vaitkus,256,‡ Z. A. Ibrahim,257,‡ J. R. Komaragiri,257,‡ M. A. B. Md Ali,257,rrr,‡

F. Mohamad Idris,257,‡ W. A. T. Wan Abdullah,257,‡ E. Casimiro Linares,258,‡ H. Castilla-Valdez,258,‡

E. De La Cruz-Burelo,258,‡ I. Heredia-de La Cruz,258,sss,‡ A. Hernandez-Almada,258,‡ R. Lopez-Fernandez,258,‡

A. Sanchez-Hernandez,258,‡ S. Carrillo Moreno,259,‡ F. Vazquez Valencia,259,‡ S. Carpinteyro,260,‡ I. Pedraza,260,‡

H. A. Salazar Ibarguen,260,‡ A. Morelos Pineda,261,‡ D. Krofcheck,262,‡ P. H. Butler,263,‡ S. Reucroft,263,‡ A. Ahmad,264,‡

M. Ahmad,264,‡ Q. Hassan,264,‡ H. R. Hoorani,264,‡ W. A. Khan,264,‡ T. Khurshid,264,‡ M. Shoaib,264,‡ H. Bialkowska,265,‡

M. Bluj,265,‡ B. Boimska,265,‡ T. Frueboes,265,‡ M. Górski,265,‡ M. Kazana,265,‡ K. Nawrocki,265,‡

K. Romanowska-Rybinska,265,‡ M. Szleper,265,‡ P. Zalewski,265,‡ G. Brona,266,‡ K. Bunkowski,266,‡ K. Doroba,266,‡

A. Kalinowski,266,‡ M. Konecki,266,‡ J. Krolikowski,266,‡ M. Misiura,266,‡ M. Olszewski,266,‡ M. Walczak,266,‡

P. Bargassa,267,‡ C. Beirão Da Cruz E Silva,267,‡ A. Di Francesco,267,‡ P. Faccioli,267,‡ P. G. Ferreira Parracho,267,‡

M. Gallinaro,267,‡ L. Lloret Iglesias,267,‡ F. Nguyen,267,‡ J. Rodrigues Antunes,267,‡ J. Seixas,267,‡ O. Toldaiev,267,‡

D. Vadruccio,267,‡ J. Varela,267,‡ P. Vischia,267,‡ S. Afanasiev,268,‡ P. Bunin,268,‡ M. Gavrilenko,268,‡ I. Golutvin,268,‡

I. Gorbunov,268,‡ A. Kamenev,268,‡ V. Karjavin,268,‡ V. Konoplyanikov,268,‡ A. Lanev,268,‡ A. Malakhov,268,‡

V. Matveev,268,ttt,‡ P. Moisenz,268,‡ V. Palichik,268,‡ V. Perelygin,268,‡ S. Shmatov,268,‡ S. Shulha,268,‡ N. Skatchkov,268,‡

V. Smirnov,268,‡ T. Toriashvili,268,uuu,‡ A. Zarubin,268,‡ V. Golovtsov,269,‡ Y. Ivanov,269,‡ V. Kim,269,vvv,‡ E. Kuznetsova,269,‡

P. Levchenko,269,‡ V. Murzin,269,‡ V. Oreshkin,269,‡ I. Smirnov,269,‡ V. Sulimov,269,‡ L. Uvarov,269,‡ S. Vavilov,269,‡

A. Vorobyev,269,‡ Yu. Andreev,270,‡ A. Dermenev,270,‡ S. Gninenko,270,‡ N. Golubev,270,‡ A. Karneyeu,270,‡ M. Kirsanov,270,‡

N. Krasnikov,270,‡ A. Pashenkov,270,‡ D. Tlisov,270,‡ A. Toropin,270,‡ V. Epshteyn,271,‡ V. Gavrilov,271,‡ N. Lychkovskaya,271,‡

V. Popov,271,‡ I. Pozdnyakov,271,‡ G. Safronov,271,‡ A. Spiridonov,271,‡ E. Vlasov,271,‡ A. Zhokin,271,‡ V. Andreev,272,‡

M. Azarkin,272,www,‡ I. Dremin,272,www,‡ M. Kirakosyan,272,‡ A. Leonidov,272,www,‡ G. Mesyats,272,‡ S. V. Rusakov,272,‡

A. Vinogradov,272,‡ A. Baskakov,273,‡ A. Belyaev,273,‡ E. Boos,273,‡ V. Bunichev,273,‡ M. Dubinin,273,xxx,‡ L. Dudko,273,‡

A. Ershov,273,‡ A. Gribushin,273,‡ V. Klyukhin,273,‡ O. Kodolova,273,‡ I. Lokhtin,273,‡ I. Myagkov,273,‡ S. Obraztsov,273,‡

S. Petrushanko,273,‡ V. Savrin,273,‡ I. Azhgirey,274,‡ I. Bayshev,274,‡ S. Bitioukov,274,‡ V. Kachanov,274,‡ A. Kalinin,274,‡

D. Konstantinov,274,‡ V. Krychkine,274,‡ V. Petrov,274,‡ R. Ryutin,274,‡ A. Sobol,274,‡ L. Tourtchanovitch,274,‡ S. Troshin,274,‡

N. Tyurin,274,‡ A. Uzunian,274,‡ A. Volkov,274,‡ P. Adzic,275,yyy,‡ M. Ekmedzic,275,‡ J. Milosevic,275,‡ V. Rekovic,275,‡

J. Alcaraz Maestre,276,‡ E. Calvo,276,‡ M. Cerrada,276,‡ M. Chamizo Llatas,276,‡ N. Colino,276,‡ B. De La Cruz,276,‡

A. Delgado Peris,276,‡ D. Domínguez Vázquez,276,‡ A. Escalante Del Valle,276,‡ C. Fernandez Bedoya,276,‡

J. P. Fernández Ramos,276,‡ J. Flix,276,‡ M. C. Fouz,276,‡ P. Garcia-Abia,276,‡ O. Gonzalez Lopez,276,‡ S. Goy Lopez,276,‡

J. M. Hernandez,276,‡ M. I. Josa,276,‡ E. Navarro De Martino,276,‡ A. Pérez-Calero Yzquierdo,276,‡ J. Puerta Pelayo,276,‡

A. Quintario Olmeda,276,‡ I. Redondo,276,‡ L. Romero,276,‡ M. S. Soares,276,‡ C. Albajar,277,‡ J. F. de Trocóniz,277,‡

M. Missiroli,277,‡ D. Moran,277,‡ H. Brun,278,‡ J. Cuevas,278,‡ J. Fernandez Menendez,278,‡ S. Folgueras,278,‡

I. Gonzalez Caballero,278,‡ E. Palencia Cortezon,278,‡ J. M. Vizan Garcia,278,‡ I. J. Cabrillo,279,‡ A. Calderon,279,‡

J. R. Castiñeiras De Saa,279,‡ J. Duarte Campderros,279,‡ M. Fernandez,279,‡ G. Gomez,279,‡ A. Graziano,279,‡

A. Lopez Virto,279,‡ J. Marco,279,‡ R. Marco,279,‡ C. Martinez Rivero,279,‡ F. Matorras,279,‡ F. J. Munoz Sanchez,279,‡

J. Piedra Gomez,279,‡ T. Rodrigo,279,‡ A. Y. Rodríguez-Marrero,279,‡ A. Ruiz-Jimeno,279,‡ L. Scodellaro,279,‡ I. Vila,279,‡

R. Vilar Cortabitarte,279,‡ D. Abbaneo,280,‡ E. Auffray,280,‡ G. Auzinger,280,‡ M. Bachtis,280,‡ P. Baillon,280,‡ A. H. Ball,280,‡

D. Barney,280,‡ A. Benaglia,280,‡ J. Bendavid,280,‡ L. Benhabib,280,‡ J. F. Benitez,280,‡ G.M. Berruti,280,‡ P. Bloch,280,‡

A. Bocci,280,‡ A. Bonato,280,‡ C. Botta,280,‡ H. Breuker,280,‡ T. Camporesi,280,‡ G. Cerminara,280,‡ S. Colafranceschi,280,zzz,‡

M. D’Alfonso,280,‡ D. d’Enterria,280,‡ A. Dabrowski,280,‡ V. Daponte,280,‡ A. David,280,‡ M. De Gruttola,280,‡ F. De Guio,280,‡

A. De Roeck,280,‡ S. De Visscher,280,‡ E. Di Marco,280,‡ M. Dobson,280,‡ M. Dordevic,280,‡ T. du Pree,280,‡

N. Dupont-Sagorin,280,‡ A. Elliott-Peisert,280,‡ G. Franzoni,280,‡ W. Funk,280,‡ D. Gigi,280,‡ K. Gill,280,‡ D. Giordano,280,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-21

M. Girone,280,‡ F. Glege,280,‡ R. Guida,280,‡ S. Gundacker,280,‡ M. Guthoff,280,‡ J. Hammer,280,‡ M. Hansen,280,‡ P. Harris,280,‡

J. Hegeman,280,‡ V. Innocente,280,‡ P. Janot,280,‡ H. Kirschenmann,280,‡ M. J. Kortelainen,280,‡ K. Kousouris,280,‡

K. Krajczar,280,‡ P. Lecoq,280,‡ C. Lourenço,280,‡ M. T. Lucchini,280,‡ N. Magini,280,‡ L. Malgeri,280,‡ M. Mannelli,280,‡

J. Marrouche,280,‡ A. Martelli,280,‡ L. Masetti,280,‡ F. Meijers,280,‡ S. Mersi,280,‡ E. Meschi,280,‡ F. Moortgat,280,‡

S. Morovic,280,‡ M. Mulders,280,‡ M. V. Nemallapudi,280,‡ H. Neugebauer,280,‡ S. Orfanelli,280,aaaa,‡ L. Orsini,280,‡

L. Pape,280,‡ E. Perez,280,‡ A. Petrilli,280,‡ G. Petrucciani,280,‡ A. Pfeiffer,280,‡ D. Piparo,280,‡ A. Racz,280,‡ G. Rolandi,280,bbbb,‡

M. Rovere,280,‡ M. Ruan,280,‡ H. Sakulin,280,‡ C. Schäfer,280,‡ C. Schwick,280,‡ A. Sharma,280,‡ P. Silva,280,‡ M. Simon,280,‡

P. Sphicas,280,cccc,‡ D. Spiga,280,‡ J. Steggemann,280,‡ B. Stieger,280,‡ M. Stoye,280,‡ Y. Takahashi,280,‡ D. Treille,280,‡

A. Tsirou,280,‡ G. I. Veres,280,ggg,‡ N. Wardle,280,‡ H. K. Wöhri,280,‡ A. Zagozdzinska,280,dddd,‡ W. D. Zeuner,280,‡ W. Bertl,281,‡

K. Deiters,281,‡ W. Erdmann,281,‡ R. Horisberger,281,‡ Q. Ingram,281,‡ H. C. Kaestli,281,‡ D. Kotlinski,281,‡

U. Langenegger,281,‡ T. Rohe,281,‡ F. Bachmair,282,‡ L. Bäni,282,‡ L. Bianchini,282,‡ M. A. Buchmann,282,‡ B. Casal,282,‡

G. Dissertori,282,‡ M. Dittmar,282,‡ M. Donegà,282,‡ M. Dünser,282,‡ P. Eller,282,‡ C. Grab,282,‡ C. Heidegger,282,‡ D. Hits,282,‡

J. Hoss,282,‡ G. Kasieczka,282,‡ W. Lustermann,282,‡ B. Mangano,282,‡ A. C. Marini,282,‡ M. Marionneau,282,‡

P. Martinez Ruiz del Arbol,282,‡ M.Masciovecchio,282,‡ D. Meister,282,‡ P. Musella,282,‡ F. Nessi-Tedaldi,282,‡ F. Pandolfi,282,‡

J. Pata,282,‡ F. Pauss,282,‡ L. Perrozzi,282,‡ M. Peruzzi,282,‡ M. Quittnat,282,‡ M. Rossini,282,‡ A. Starodumov,282,eeee,‡

M. Takahashi,282,‡ V. R. Tavolaro,282,‡ K. Theofilatos,282,‡ R. Wallny,282,‡ H. A. Weber,282,‡ T. K. Aarrestad,283,‡

C. Amsler,283,ffff,‡ M. F. Canelli,283,‡ V. Chiochia,283,‡ A. De Cosa,283,‡ C. Galloni,283,‡ A. Hinzmann,283,‡ T. Hreus,283,‡

B. Kilminster,283,‡ C. Lange,283,‡ J. Ngadiuba,283,‡ D. Pinna,283,‡ P. Robmann,283,‡ F. J. Ronga,283,‡ D. Salerno,283,‡

S. Taroni,283,‡ Y. Yang,283,‡ M. Cardaci,284,‡ K. H. Chen,284,‡ T. H. Doan,284,‡ C. Ferro,284,‡ M. Konyushikhin,284,‡

C.M. Kuo,284,‡ W. Lin,284,‡ Y. J. Lu,284,‡ R. Volpe,284,‡ S. S. Yu,284,‡ P. Chang,285,‡ Y. H. Chang,285,‡ Y.W. Chang,285,‡

Y. Chao,285,‡ K. F. Chen,285,‡ P. H. Chen,285,‡ C. Dietz,285,‡ F. Fiori,285,‡ U. Grundler,285,‡ W.-S. Hou,285,‡ Y. Hsiung,285,‡

Y. F. Liu,285,‡ R.-S. Lu,285,‡ M. Miñano Moya,285,‡ E. Petrakou,285,‡ J. f. Tsai,285,‡ Y.M. Tzeng,285,‡ R. Wilken,285,‡

B. Asavapibhop,286,‡ K. Kovitanggoon,286,‡ G. Singh,286,‡ N. Srimanobhas,286,‡ N. Suwonjandee,286,‡ A. Adiguzel,287,‡

S. Cerci,287,gggg,‡ C. Dozen,287,‡ S. Girgis,287,‡ G. Gokbulut,287,‡ Y. Guler,287,‡ E. Gurpinar,287,‡ I. Hos,287,‡

E. E. Kangal,287,hhhh,‡ A. Kayis Topaksu,287,‡ G. Onengut,287,iiii,‡ K. Ozdemir,287,jjjj,‡ S. Ozturk,287,kkkk,‡ B. Tali,287,gggg,‡

H. Topakli,287,kkkk,‡ M. Vergili,287,‡ C. Zorbilmez,287,‡ I. V. Akin,288,‡ B. Bilin,288,‡ S. Bilmis,288,‡ B. Isildak,288,llll,‡

G. Karapinar,288,mmmm,‡ U. E. Surat,288,‡ M. Yalvac,288,‡ M. Zeyrek,288,‡ E. A. Albayrak,289,nnnn,‡ E. Gülmez,289,‡

M. Kaya,289,oooo,‡ O. Kaya,289,pppp,‡ T. Yetkin,289,qqqq,‡ K. Cankocak,290,‡ S. Sen,290,rrrr,‡ F. I. Vardarlı,290,‡ B. Grynyov,291,‡

L. Levchuk,292,‡ P. Sorokin,292,‡ R. Aggleton,293,‡ F. Ball,293,‡ L. Beck,293,‡ J. J. Brooke,293,‡ E. Clement,293,‡ D. Cussans,293,‡

H. Flacher,293,‡ J. Goldstein,293,‡ M. Grimes,293,‡ G. P. Heath,293,‡ H. F. Heath,293,‡ J. Jacob,293,‡ L. Kreczko,293,‡

C. Lucas,293,‡ Z. Meng,293,‡ D.M. Newbold,293,ssss,‡ S. Paramesvaran,293,‡ A. Poll,293,‡ T. Sakuma,293,‡

S. Seif El Nasr-storey,293,‡ S. Senkin,293,‡ D. Smith,293,‡ V. J. Smith,293,‡ K.W. Bell,294,‡ A. Belyaev,294,tttt,‡ C. Brew,294,‡

R.M. Brown,294,‡ D. J. A. Cockerill,294,‡ J. A. Coughlan,294,‡ K. Harder,294,‡ S. Harper,294,‡ E. Olaiya,294,‡ D. Petyt,294,‡

C. H. Shepherd-Themistocleous,294,‡ A. Thea,294,‡ I. R. Tomalin,294,‡ T. Williams,294,‡ W. J. Womersley,294,‡ S. D. Worm,294,‡

M. Baber,295,‡ R. Bainbridge,295,‡ O. Buchmuller,295,‡ A. Bundock,295,‡ D. Burton,295,‡ S. Casasso,295,‡ M. Citron,295,‡

D. Colling,295,‡ L. Corpe,295,‡ N. Cripps,295,‡ P. Dauncey,295,‡ G. Davies,295,‡ A. De Wit,295,‡ M. Della Negra,295,‡

P. Dunne,295,‡ A. Elwood,295,‡ W. Ferguson,295,‡ J. Fulcher,295,‡ D. Futyan,295,‡ G. Hall,295,‡ G. Iles,295,‡ G. Karapostoli,295,‡

M. Kenzie,295,‡ R. Lane,295,‡ R. Lucas,295,ssss,‡ L. Lyons,295,‡ A.-M. Magnan,295,‡ S. Malik,295,‡ J. Nash,295,‡

A. Nikitenko,295,eeee,‡ J. Pela,295,‡ M. Pesaresi,295,‡ K. Petridis,295,‡ D.M. Raymond,295,‡ A. Richards,295,‡ A. Rose,295,‡

C. Seez,295,‡ P. Sharp,295,,‡ A. Tapper,295,‡ K. Uchida,295,‡ M. Vazquez Acosta,295,uuuu,‡ T. Virdee,295,‡ S. C. Zenz,295,‡

J. E. Cole,296,‡ P. R. Hobson,296,‡ A. Khan,296,‡ P. Kyberd,296,‡ D. Leggat,296,‡ D. Leslie,296,‡ I. D. Reid,296,‡ P. Symonds,296,‡

L. Teodorescu,296,‡ M. Turner,296,‡ A. Borzou,297,‡ J. Dittmann,297,‡ K. Hatakeyama,297,‡ A. Kasmi,297,‡ H. Liu,297,‡

N. Pastika,297,‡ O. Charaf,298,‡ S. I. Cooper,298,‡ C. Henderson,298,‡ P. Rumerio,298,‡ A. Avetisyan,299,‡ T. Bose,299,‡

C. Fantasia,299,‡ D. Gastler,299,‡ P. Lawson,299,‡ D. Rankin,299,‡ C. Richardson,299,‡ J. Rohlf,299,‡ J. St. John,299,‡ L. Sulak,299,‡

D. Zou,299,‡ J. Alimena,300,‡ E. Berry,300,‡ S. Bhattacharya,300,‡ D. Cutts,300,‡ N. Dhingra,300,‡ A. Ferapontov,300,‡

A. Garabedian,300,‡ U. Heintz,300,‡ E. Laird,300,‡ G. Landsberg,300,‡ Z. Mao,300,‡ M. Narain,300,‡ S. Sagir,300,‡

T. Sinthuprasith,300,‡ R. Breedon,301,‡G. Breto,301,‡M. Calderon De La Barca Sanchez,301,‡ S. Chauhan,301,‡M. Chertok,301,‡

J. Conway,301,‡ R. Conway,301,‡ P. T. Cox,301,‡ R. Erbacher,301,‡M. Gardner,301,‡W. Ko,301,‡ R. Lander,301,‡M.Mulhearn,301,‡

D. Pellett,301,‡ J. Pilot,301,‡ F. Ricci-Tam,301,‡ S. Shalhout,301,‡ J. Smith,301,‡ M. Squires,301,‡ D. Stolp,301,‡ M. Tripathi,301,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-22

S. Wilbur,301,‡ R. Yohay,301,‡ R. Cousins,302,‡ P. Everaerts,302,‡ C. Farrell,302,‡ J. Hauser,302,‡ M. Ignatenko,302,‡

G. Rakness,302,‡ D. Saltzberg,302,‡ E. Takasugi,302,‡ V. Valuev,302,‡ M. Weber,302,‡ K. Burt,303,‡ R. Clare,303,‡ J. Ellison,303,‡

J. W. Gary,303,‡ G. Hanson,303,‡ J. Heilman,303,‡ M. Ivova Rikova,303,‡ P. Jandir,303,‡ E. Kennedy,303,‡ F. Lacroix,303,‡

O. R. Long,303,‡ A. Luthra,303,‡ M. Malberti,303,‡ M. Olmedo Negrete,303,‡ A. Shrinivas,303,‡ S. Sumowidagdo,303,‡

H. Wei,303,‡ S. Wimpenny,303,‡ J. G. Branson,304,‡ G. B. Cerati,304,‡ S. Cittolin,304,‡ R. T. D’Agnolo,304,‡ A. Holzner,304,‡

R. Kelley,304,‡ D. Klein,304,‡ J. Letts,304,‡ I. Macneill,304,‡ D. Olivito,304,‡ S. Padhi,304,‡ M. Pieri,304,‡ M. Sani,304,‡

V. Sharma,304,‡ S. Simon,304,‡ M. Tadel,304,‡ Y. Tu,304,‡ A. Vartak,304,‡ S. Wasserbaech,304,vvvv,‡ C. Welke,304,‡

F. Würthwein,304,‡ A. Yagil,304,‡ G. Zevi Della Porta,304,‡ D. Barge,305,‡ J. Bradmiller-Feld,305,‡ C. Campagnari,305,‡

A. Dishaw,305,‡ V. Dutta,305,‡ K. Flowers,305,‡ M. Franco Sevilla,305,‡ P. Geffert,305,‡ C. George,305,‡ F. Golf,305,‡

L. Gouskos,305,‡ J. Gran,305,‡ J. Incandela,305,‡ C. Justus,305,‡ N. Mccoll,305,‡ S. D. Mullin,305,‡ J. Richman,305,‡ D. Stuart,305,‡

I. Suarez,305,‡ W. To,305,‡ C. West,305,‡ J. Yoo,305,‡ D. Anderson,306,‡ A. Apresyan,306,‡ A. Bornheim,306,‡ J. Bunn,306,‡

Y. Chen,306,‡ J. Duarte,306,‡ A. Mott,306,‡ H. B. Newman,306,‡ C. Pena,306,‡ M. Pierini,306,‡ M. Spiropulu,306,‡

J. R. Vlimant,306,‡ S. Xie,306,‡ R. Y. Zhu,306,‡ V. Azzolini,307,‡ A. Calamba,307,‡ B. Carlson,307,‡ T. Ferguson,307,‡

Y. Iiyama,307,‡ M. Paulini,307,‡ J. Russ,307,‡ M. Sun,307,‡ H. Vogel,307,‡ I. Vorobiev,307,‡ J. P. Cumalat,308,‡ W. T. Ford,308,‡

A. Gaz,308,‡ F. Jensen,308,‡ A. Johnson,308,‡ M. Krohn,308,‡ T. Mulholland,308,‡ U. Nauenberg,308,‡ J. G. Smith,308,‡

K. Stenson,308,‡ S. R. Wagner,308,‡ J. Alexander,309,‡ A. Chatterjee,309,‡ J. Chaves,309,‡ J. Chu,309,‡ S. Dittmer,309,‡

N. Eggert,309,‡ N. Mirman,309,‡ G. Nicolas Kaufman,309,‡ J. R. Patterson,309,‡ A. Rinkevicius,309,‡ A. Ryd,309,‡

L. Skinnari,309,‡ L. Soffi,309,‡ W. Sun,309,‡ S. M. Tan,309,‡ W.D. Teo,309,‡ J. Thom,309,‡ J. Thompson,309,‡ J. Tucker,309,‡

Y. Weng,309,‡ P. Wittich,309,‡ S. Abdullin,310,‡ M. Albrow,310,‡ J. Anderson,310,‡ G. Apollinari,310,‡ L. A. T. Bauerdick,310,‡

A. Beretvas,310,‡ J. Berryhill,310,‡ P. C. Bhat,310,‡ G. Bolla,310,‡ K. Burkett,310,‡ J. N. Butler,310,‡ H.W. K. Cheung,310,‡

F. Chlebana,310,‡ S. Cihangir,310,‡ V. D. Elvira,310,‡ I. Fisk,310,‡ J. Freeman,310,‡ E. Gottschalk,310,‡ L. Gray,310,‡ D. Green,310,‡

S. Grünendahl,310,‡ O. Gutsche,310,‡ J. Hanlon,310,‡ D. Hare,310,‡ R.M. Harris,310,‡ J. Hirschauer,310,‡ B. Hooberman,310,‡

Z. Hu,310,‡ S. Jindariani,310,‡ M. Johnson,310,‡ U. Joshi,310,‡ A.W. Jung,310,‡ B. Klima,310,‡ B. Kreis,310,‡ S. Kwan,310,,‡

S. Lammel,310,‡ J. Linacre,310,‡ D. Lincoln,310,‡ R. Lipton,310,‡ T. Liu,310,‡ R. Lopes De Sá,310,‡ J. Lykken,310,‡

K. Maeshima,310,‡ J. M. Marraffino,310,‡ V. I. Martinez Outschoorn,310,‡ S. Maruyama,310,‡ D. Mason,310,‡ P. McBride,310,‡

P. Merkel,310,‡ K. Mishra,310,‡ S. Mrenna,310,‡ S. Nahn,310,‡ C. Newman-Holmes,310,‡ V. O’Dell,310,‡ O. Prokofyev,310,‡

E. Sexton-Kennedy,310,‡ A. Soha,310,‡ W. J. Spalding,310,‡ L. Spiegel,310,‡ L. Taylor,310,‡ S. Tkaczyk,310,‡ N. V. Tran,310,‡

L. Uplegger,310,‡ E.W. Vaandering,310,‡ C. Vernieri,310,‡ M. Verzocchi,310,‡ R. Vidal,310,‡ A. Whitbeck,310,‡ F. Yang,310,‡

H. Yin,310,‡ D. Acosta,311,‡ P. Avery,311,‡ P. Bortignon,311,‡ D. Bourilkov,311,‡ A. Carnes,311,‡ M. Carver,311,‡ D. Curry,311,‡

S. Das,311,‡ G. P. Di Giovanni,311,‡ R. D. Field,311,‡ M. Fisher,311,‡ I. K. Furic,311,‡ J. Hugon,311,‡ J. Konigsberg,311,‡

A. Korytov,311,‡ J. F. Low,311,‡ P. Ma,311,‡ K. Matchev,311,‡ H. Mei,311,‡ P. Milenovic,311,wwww,‡ G. Mitselmakher,311,‡

L. Muniz,311,‡ D. Rank,311,‡ L. Shchutska,311,‡ M. Snowball,311,‡ D. Sperka,311,‡ S. j. Wang,311,‡ J. Yelton,311,‡

S. Hewamanage,312,‡ S. Linn,312,‡ P. Markowitz,312,‡ G. Martinez,312,‡ J. L. Rodriguez,312,‡ A. Ackert,313,‡ J. R. Adams,313,‡

T. Adams,313,‡ A. Askew,313,‡ J. Bochenek,313,‡ B. Diamond,313,‡ J. Haas,313,‡ S. Hagopian,313,‡ V. Hagopian,313,‡

K. F. Johnson,313,‡ A. Khatiwada,313,‡ H. Prosper,313,‡ V. Veeraraghavan,313,‡ M. Weinberg,313,‡ V. Bhopatkar,314,‡

M. Hohlmann,314,‡ H. Kalakhety,314,‡ D. Mareskas-palcek,314,‡ T. Roy,314,‡ F. Yumiceva,314,‡ M. R. Adams,315,‡

L. Apanasevich,315,‡ D. Berry,315,‡ R. R. Betts,315,‡ I. Bucinskaite,315,‡ R. Cavanaugh,315,‡ O. Evdokimov,315,‡

L. Gauthier,315,‡ C. E. Gerber,315,‡ D. J. Hofman,315,‡ P. Kurt,315,‡ C. O’Brien,315,‡ I. D. Sandoval Gonzalez,315,‡

C. Silkworth,315,‡ P. Turner,315,‡ N. Varelas,315,‡ Z. Wu,315,‡ M. Zakaria,315,‡ B. Bilki,316,xxxx,‡ W. Clarida,316,‡ K. Dilsiz,316,‡

S. Durgut,316,‡ R. P. Gandrajula,316,‡ M. Haytmyradov,316,‡ V. Khristenko,316,‡ J.-P. Merlo,316,‡ H. Mermerkaya,316,yyyy,‡

A. Mestvirishvili,316,‡ A. Moeller,316,‡ J. Nachtman,316,‡ H. Ogul,316,‡ Y. Onel,316,‡ F. Ozok,316,nnnn,‡ A. Penzo,316,‡

C. Snyder,316,‡ P. Tan,316,‡ E. Tiras,316,‡ J. Wetzel,316,‡ K. Yi,316,‡ I. Anderson,317,‡ B. A. Barnett,317,‡ B. Blumenfeld,317,‡

D. Fehling,317,‡ L. Feng,317,‡ A. V. Gritsan,317,‡ P. Maksimovic,317,‡ C. Martin,317,‡ K. Nash,317,‡ M. Osherson,317,‡

M. Swartz,317,‡ M. Xiao,317,‡ Y. Xin,317,‡ P. Baringer,318,‡ A. Bean,318,‡ G. Benelli,318,‡ C. Bruner,318,‡ J. Gray,318,‡

R. P. Kenny III,318,‡ D. Majumder,318,‡ M. Malek,318,‡ M. Murray,318,‡ D. Noonan,318,‡ S. Sanders,318,‡ R. Stringer,318,‡

Q. Wang,318,‡ J. S. Wood,318,‡ I. Chakaberia,319,‡ A. Ivanov,319,‡ K. Kaadze,319,‡ S. Khalil,319,‡ M. Makouski,319,‡

Y. Maravin,319,‡ L. K. Saini,319,‡ N. Skhirtladze,319,‡ I. Svintradze,319,‡ S. Toda,319,‡ D. Lange,320,‡ F. Rebassoo,320,‡

D. Wright,320,‡ C. Anelli,321,‡ A. Baden,321,‡ O. Baron,321,‡ A. Belloni,321,‡ B. Calvert,321,‡ S. C. Eno,321,‡ C. Ferraioli,321,‡

J. A. Gomez,321,‡ N. J. Hadley,321,‡ S. Jabeen,321,‡ R. G. Kellogg,321,‡ T. Kolberg,321,‡ J. Kunkle,321,‡ Y. Lu,321,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-23

A. C. Mignerey,321,‡ K. Pedro,321,‡ Y. H. Shin,321,‡ A. Skuja,321,‡ M. B. Tonjes,321,‡ S. C. Tonwar,321,‡ A. Apyan,322,‡

R. Barbieri,322,‡ A. Baty,322,‡ K. Bierwagen,322,‡ S. Brandt,322,‡ W. Busza,322,‡ I. A. Cali,322,‡ L. Di Matteo,322,‡

G. Gomez Ceballos,322,‡ M. Goncharov,322,‡ D. Gulhan,322,‡ G.M. Innocenti,322,‡ M. Klute,322,‡ D. Kovalskyi,322,‡

Y. S. Lai,322,‡ Y.-J. Lee,322,‡ A. Levin,322,‡ P. D. Luckey,322,‡ C. Mcginn,322,‡ X. Niu,322,‡ C. Paus,322,‡ D. Ralph,322,‡

C. Roland,322,‡ G. Roland,322,‡ G. S. F. Stephans,322,‡ K. Sumorok,322,‡ M. Varma,322,‡ D. Velicanu,322,‡ J. Veverka,322,‡

J. Wang,322,‡ T.W. Wang,322,‡ B. Wyslouch,322,‡ M. Yang,322,‡ V. Zhukova,322,‡ B. Dahmes,323,‡ A. Finkel,323,‡ A. Gude,323,‡

P. Hansen,323,‡ S. Kalafut,323,‡ S. C. Kao,323,‡ K. Klapoetke,323,‡ Y. Kubota,323,‡ Z. Lesko,323,‡ J. Mans,323,‡

S. Nourbakhsh,323,‡ N. Ruckstuhl,323,‡ R. Rusack,323,‡ N. Tambe,323,‡ J. Turkewitz,323,‡ J. G. Acosta,324,‡ S. Oliveros,324,‡

E. Avdeeva,325,‡ K. Bloom,325,‡ S. Bose,325,‡ D. R. Claes,325,‡ A. Dominguez,325,‡ C. Fangmeier,325,‡ R. Gonzalez Suarez,325,‡

R. Kamalieddin,325,‡ J. Keller,325,‡ D. Knowlton,325,‡ I. Kravchenko,325,‡ J. Lazo-Flores,325,‡ F. Meier,325,‡ J. Monroy,325,‡

F. Ratnikov,325,‡ J. E. Siado,325,‡ G. R. Snow,325,‡ M. Alyari,326,‡ J. Dolen,326,‡ J. George,326,‡ A. Godshalk,326,‡ I. Iashvili,326,‡

J. Kaisen,326,‡ A. Kharchilava,326,‡ A. Kumar,326,‡ S. Rappoccio,326,‡ G. Alverson,327,‡ E. Barberis,327,‡ D. Baumgartel,327,‡

M. Chasco,327,‡ A. Hortiangtham,327,‡ A. Massironi,327,‡ D.M. Morse,327,‡ D. Nash,327,‡ T. Orimoto,327,‡

R. Teixeira De Lima,327,‡ D. Trocino,327,‡ R.-J. Wang,327,‡ D. Wood,327,‡ J. Zhang,327,‡ K. A. Hahn,328,‡ A. Kubik,328,‡

N. Mucia,328,‡ N. Odell,328,‡ B. Pollack,328,‡ A. Pozdnyakov,328,‡ M. Schmitt,328,‡ S. Stoynev,328,‡ K. Sung,328,‡

M. Trovato,328,‡ M. Velasco,328,‡ S. Won,328,‡ A. Brinkerhoff,329,‡ N. Dev,329,‡ M. Hildreth,329,‡ C. Jessop,329,‡

D. J. Karmgard,329,‡ N. Kellams,329,‡ K. Lannon,329,‡ S. Lynch,329,‡ N. Marinelli,329,‡ F. Meng,329,‡ C. Mueller,329,‡

Y. Musienko,329,ttt,‡ T. Pearson,329,‡ M. Planer,329,‡ R. Ruchti,329,‡ G. Smith,329,‡ N. Valls,329,‡ M. Wayne,329,‡ M. Wolf,329,‡

A. Woodard,329,‡ L. Antonelli,330,‡ J. Brinson,330,‡ B. Bylsma,330,‡ L. S. Durkin,330,‡ S. Flowers,330,‡ A. Hart,330,‡ C. Hill,330,‡

R. Hughes,330,‡ K. Kotov,330,‡ T. Y. Ling,330,‡ B. Liu,330,‡ W. Luo,330,‡ D. Puigh,330,‡ M. Rodenburg,330,‡ B. L. Winer,330,‡

H.W. Wulsin,330,‡ O. Driga,331,‡ P. Elmer,331,‡ J. Hardenbrook,331,‡ P. Hebda,331,‡ S. A. Koay,331,‡ P. Lujan,331,‡

D. Marlow,331,‡ T. Medvedeva,331,‡ M. Mooney,331,‡ J. Olsen,331,‡ C. Palmer,331,‡ P. Piroué,331,‡ X. Quan,331,‡ H. Saka,331,‡

D. Stickland,331,‡ C. Tully,331,‡ J. S. Werner,331,‡ A. Zuranski,331,‡ V. E. Barnes,332,‡ D. Benedetti,332,‡ D. Bortoletto,332,‡

L. Gutay,332,‡M. K. Jha,332,‡M. Jones,332,‡K. Jung,332,‡M. Kress,332,‡N. Leonardo,332,‡D. H. Miller,332,‡N. Neumeister,332,‡

F. Primavera,332,‡ B. C. Radburn-Smith,332,‡ X. Shi,332,‡ I. Shipsey,332,‡ D. Silvers,332,‡ J. Sun,332,‡ A. Svyatkovskiy,332,‡

F. Wang,332,‡ W. Xie,332,‡ L. Xu,332,‡ J. Zablocki,332,‡ N. Parashar,333,‡ J. Stupak,333,‡ A. Adair,334,‡ B. Akgun,334,‡

Z. Chen,334,‡ K.M. Ecklund,334,‡ F. J. M. Geurts,334,‡ M. Guilbaud,334,‡ W. Li,334,‡ B. Michlin,334,‡ M. Northup,334,‡

B. P. Padley,334,‡ R. Redjimi,334,‡ J. Roberts,334,‡ J. Rorie,334,‡ Z. Tu,334,‡ J. Zabel,334,‡ B. Betchart,335,‡ A. Bodek,335,‡

P. de Barbaro,335,‡ R. Demina,335,‡ Y. Eshaq,335,‡ T. Ferbel,335,‡ M. Galanti,335,‡ A. Garcia-Bellido,335,‡ P. Goldenzweig,335,‡

J. Han,335,‡ A. Harel,335,‡ O. Hindrichs,335,‡ A. Khukhunaishvili,335,‡ G. Petrillo,335,‡ M. Verzetti,335,‡ L. Demortier,336,‡

S. Arora,337,‡ A. Barker,337,‡ J. P. Chou,337,‡ C. Contreras-Campana,337,‡ E. Contreras-Campana,337,‡ D. Duggan,337,‡

D. Ferencek,337,‡ Y. Gershtein,337,‡ R. Gray,337,‡ E. Halkiadakis,337,‡ D. Hidas,337,‡ E. Hughes,337,‡ S. Kaplan,337,‡

R. Kunnawalkam Elayavalli,337,‡ A. Lath,337,‡ S. Panwalkar,337,‡ M. Park,337,‡ S. Salur,337,‡ S. Schnetzer,337,‡

D. Sheffield,337,‡ S. Somalwar,337,‡ R. Stone,337,‡ S. Thomas,337,‡ P. Thomassen,337,‡ M. Walker,337,‡ M. Foerster,338,‡

G. Riley,338,‡ K. Rose,338,‡ S. Spanier,338,‡ A. York,338,‡ O. Bouhali,339,zzzz,‡ A. Castaneda Hernandez,339,‡ M. Dalchenko,339,‡

M. De Mattia,339,‡ A. Delgado,339,‡ S. Dildick,339,‡ R. Eusebi,339,‡ W. Flanagan,339,‡ J. Gilmore,339,‡ T. Kamon,339,aaaaa,‡

V. Krutelyov,339,‡ R. Montalvo,339,‡ R. Mueller,339,‡ I. Osipenkov,339,‡ Y. Pakhotin,339,‡ R. Patel,339,‡ A. Perloff,339,‡

J. Roe,339,‡ A. Rose,339,‡ A. Safonov,339,‡ A. Tatarinov,339,‡ K. A. Ulmer,339,oo,‡ N. Akchurin,340,‡ C. Cowden,340,‡

J. Damgov,340,‡ C. Dragoiu,340,‡ P. R. Dudero,340,‡ J. Faulkner,340,‡ S. Kunori,340,‡ K. Lamichhane,340,‡ S.W. Lee,340,‡

T. Libeiro,340,‡ S. Undleeb,340,‡ I. Volobouev,340,‡ E. Appelt,341,‡ A. G. Delannoy,341,‡ S. Greene,341,‡ A. Gurrola,341,‡

R. Janjam,341,‡ W. Johns,341,‡ C. Maguire,341,‡ Y. Mao,341,‡ A. Melo,341,‡ P. Sheldon,341,‡ B. Snook,341,‡ S. Tuo,341,‡

J. Velkovska,341,‡ Q. Xu,341,‡ M.W. Arenton,342,‡ S. Boutle,342,‡ B. Cox,342,‡ B. Francis,342,‡ J. Goodell,342,‡ R. Hirosky,342,‡

A. Ledovskoy,342,‡ H. Li,342,‡ C. Lin,342,‡ C. Neu,342,‡ E. Wolfe,342,‡ J. Wood,342,‡ F. Xia,342,‡ C. Clarke,343,‡ R. Harr,343,‡

P. E. Karchin,343,‡ C. Kottachchi Kankanamge Don,343,‡ P. Lamichhane,343,‡ J. Sturdy,343,‡ D. A. Belknap,344,‡

D. Carlsmith,344,‡ M. Cepeda,344,‡ A. Christian,344,‡ S. Dasu,344,‡ L. Dodd,344,‡ S. Duric,344,‡ E. Friis,344,‡ B. Gomber,344,‡

R. Hall-Wilton,344,‡ M. Herndon,344,‡ A. Hervé,344,‡ P. Klabbers,344,‡ A. Lanaro,344,‡ A. Levine,344,‡ K. Long,344,‡

R. Loveless,344,‡ A. Mohapatra,344,‡ I. Ojalvo,344,‡ T. Perry,344,‡ G. A. Pierro,344,‡ G. Polese,344,‡ I. Ross,344,‡ T. Ruggles,344,‡

T. Sarangi,344,‡ A. Savin,344,‡ A. Sharma,344,‡ N. Smith,344,‡ W. H. Smith,344,‡ D. Taylor,344,‡ and N. Woods344,‡

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-24

(ATLAS Collaboration)†(CMS Collaboration)‡

1Department of Physics, University of Adelaide, Adelaide, Australia2Physics Department, SUNY Albany, Albany, New York, USA

3Department of Physics, University of Alberta, Edmonton, Alberta, Canada4aDepartment of Physics, Ankara University, Ankara, Turkey

4bIstanbul Aydin University, Istanbul, Turkey4cDivision of Physics, TOBB University of Economics and Technology, Ankara, Turkey

5LAPP, CNRS/IN2P3 and Université Savoie Mont Blanc, Annecy-le-Vieux, France6High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois, USA

7Department of Physics, University of Arizona, Tucson, Arizona, USA8Department of Physics, The University of Texas at Arlington, Arlington, Texas, USA

9Physics Department, University of Athens, Athens, Greece10Physics Department, National Technical University of Athens, Zografou, Greece

11Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan12Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona, Barcelona, Spain

13Institute of Physics, University of Belgrade, Belgrade, Serbia14Department for Physics and Technology, University of Bergen, Bergen, Norway

15Physics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley, California, USA16Department of Physics, Humboldt University, Berlin, Germany

17Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern, Bern, Switzerland18School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom

19aDepartment of Physics, Bogazici University, Istanbul, Turkey19bDepartment of Physics, Dogus University, Istanbul, Turkey

19cDepartment of Physics Engineering, Gaziantep University, Gaziantep, Turkey20aINFN Sezione di Bologna, Bologna, Italy

20bDipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy21Physikalisches Institut, University of Bonn, Bonn, Germany

22Department of Physics, Boston University, Boston, Massachusetts, USA23Department of Physics, Brandeis University, Waltham, Massachusetts, USA

24aUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, Brazil24bElectrical Circuits Department, Federal University of Juiz de Fora (UFJF), Juiz de Fora, Brazil

24cFederal University of Sao Joao del Rei (UFSJ), Sao Joao del Rei, Brazil24dInstituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Brazil

25Physics Department, Brookhaven National Laboratory, Upton, New York, USA26aNational Institute of Physics and Nuclear Engineering, Bucharest, Romania

26bNational Institute for Research and Development of Isotopic and Molecular Technologies,Physics Department, Cluj Napoca, Romania

26cUniversity Politehnica Bucharest, Bucharest, Romania26dWest University in Timisoara, Timisoara, Romania

27Departamento de Física, Universidad de Buenos Aires, Buenos Aires, Argentina28Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

29Department of Physics, Carleton University, Ottawa, Ontario, Canada30CERN, Geneva, Switzerland

31Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA32aDepartamento de Física, Pontificia Universidad Católica de Chile, Santiago, Chile

32bDepartamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile33aInstitute of High Energy Physics, Chinese Academy of Sciences, Beijing, China

33bDepartment of Modern Physics, University of Science and Technology of China, Anhui, China33cDepartment of Physics, Nanjing University, Jiangsu, China33dSchool of Physics, Shandong University, Shandong, China

33eDepartment of Physics and Astronomy, Shanghai Key Laboratory for Particle Physics and Cosmology,Shanghai Jiao Tong University, Shanghai, China

33fPhysics Department, Tsinghua University, Beijing 100084, China34Laboratoire de Physique Corpusculaire, Clermont Université and Université Blaise Pascal and CNRS/IN2P3,

Clermont-Ferrand, France35Nevis Laboratory, Columbia University, Irvington, New York, USA

36Niels Bohr Institute, University of Copenhagen, Kobenhavn, Denmark

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-25

37aINFN Gruppo Collegato di Cosenza, Laboratori Nazionali di Frascati, Frascati, Italy37bDipartimento di Fisica, Università della Calabria, Rende, Italy

38aAGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland38bMarian Smoluchowski Institute of Physics, Jagiellonian University, Krakow, Poland

39Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland40Physics Department, Southern Methodist University, Dallas, Texas, USA

41Physics Department, University of Texas at Dallas, Richardson, Texas, USA42DESY, Hamburg and Zeuthen, Germany

43Institut für Experimentelle Physik IV, Technische Universität Dortmund, Dortmund, Germany44Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany

45Department of Physics, Duke University, Durham, North Carolina, USA46SUPA-School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom

47INFN Laboratori Nazionali di Frascati, Frascati, Italy48Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany

49Section de Physique, Université de Genève, Geneva, Switzerland50aINFN Sezione di Genova, Genova, Italy

50bDipartimento di Fisica, Università di Genova, Genova, Italy51aE. Andronikashvili Institute of Physics, Iv. Javakhishvili Tbilisi State University, Tbilisi, Georgia

51bHigh Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia52II Physikalisches Institut, Justus-Liebig-Universität Giessen, Giessen, Germany

53SUPA-School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom54II Physikalisches Institut, Georg-August-Universität, Göttingen, Germany

55Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France56Department of Physics, Hampton University, Hampton, Virginia, USA

57Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, Massachusetts, USA58aKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

58bPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany58cZITI Institut für technische Informatik, Ruprecht-Karls-Universität Heidelberg, Mannheim, Germany

59Faculty of Applied Information Science, Hiroshima Institute of Technology, Hiroshima, Japan60aDepartment of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China

60bDepartment of Physics, The University of Hong Kong, Hong Kong, China60cDepartment of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

61Department of Physics, Indiana University, Bloomington, Indiana, USA62Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität, Innsbruck, Austria

63University of Iowa, Iowa City, Iowa, USA64Department of Physics and Astronomy, Iowa State University, Ames, Iowa, USA

65Joint Institute for Nuclear Research, JINR Dubna, Dubna, Russia66KEK, High Energy Accelerator Research Organization, Tsukuba, Japan

67Graduate School of Science, Kobe University, Kobe, Japan68Faculty of Science, Kyoto University, Kyoto, Japan

69Kyoto University of Education, Kyoto, Japan70Department of Physics, Kyushu University, Fukuoka, Japan

71Instituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina72Physics Department, Lancaster University, Lancaster, United Kingdom

73aINFN Sezione di Lecce, Lecce, Italy73bDipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy

74Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom75Department of Physics, Jožef Stefan Institute and University of Ljubljana, Ljubljana, Slovenia

76School of Physics and Astronomy, Queen Mary University of London, London, United Kingdom77Department of Physics, Royal Holloway University of London, Surrey, United Kingdom

78Department of Physics and Astronomy, University College London, London, United Kingdom79Louisiana Tech University, Ruston, Louisiana, USA

80Laboratoire de Physique Nucléaire et de Hautes Energies, UPMC and Université Paris-Diderot and CNRS/IN2P3, Paris, France81Fysiska institutionen, Lunds universitet, Lund, Sweden

82Departamento de Fisica Teorica C-15, Universidad Autonoma de Madrid, Madrid, Spain83Institut für Physik, Universität Mainz, Mainz, Germany

84School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom85CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France

86Department of Physics, University of Massachusetts, Amherst, Massachusetts, USA87Department of Physics, McGill University, Montreal, Quebec, Canada

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-26

88School of Physics, University of Melbourne, Victoria, Australia89Department of Physics, The University of Michigan, Ann Arbor, Michigan, USA

90Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, USA91aINFN Sezione di Milano, Milano, Italy

91bDipartimento di Fisica, Università di Milano, Milano, Italy92B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Republic of Belarus

93National Scientific and Educational Centre for Particle and High Energy Physics, Minsk, Republic of Belarus94Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

95Group of Particle Physics, University of Montreal, Montreal, Quebec, Canada96P.N. Lebedev Institute of Physics, Academy of Sciences, Moscow, Russia

97Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia98National Research Nuclear University MEPhI, Moscow, Russia

99D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow, Russia100Fakultät für Physik, Ludwig-Maximilians-Universität München, München, Germany101Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany

102Nagasaki Institute of Applied Science, Nagasaki, Japan103Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan

104aINFN Sezione di Napoli, Napoli, Italy104bDipartimento di Fisica, Università di Napoli, Napoli, Italy

105Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico, USA106Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Netherlands

107Nikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, Netherlands108Department of Physics, Northern Illinois University, DeKalb, Illinois, USA

109Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, Russia110Department of Physics, New York University, New York, New York, USA

111The Ohio State University, Columbus, Ohio, USA112Faculty of Science, Okayama University, Okayama, Japan

113Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma, USA114Department of Physics, Oklahoma State University, Stillwater, Oklahoma, USA

115Palacký University, RCPTM, Olomouc, Czech Republic116Center for High Energy Physics, University of Oregon, Eugene, Oregon, USA

117LAL, Université Paris-Sud and CNRS/IN2P3, Orsay, France118Graduate School of Science, Osaka University, Osaka, Japan

119Department of Physics, University of Oslo, Oslo, Norway120Department of Physics, Oxford University, Oxford, United Kingdom

121aINFN Sezione di Pavia, Pavia, Italy121bDipartimento di Fisica, Università di Pavia, Pavia, Italy

122Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania, USA123National Research Centre “Kurchatov Institute” B.P.Konstantinov Petersburg Nuclear Physics Institute, St. Petersburg, Russia

124aINFN Sezione di Pisa, Pisa, Italy124bDipartimento di Fisica E. Fermi, Università di Pisa, Pisa, Italy

125Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA126aLaboratorio de Instrumentacao e Fisica Experimental de Particulas-LIP, Lisboa, Portugal

126bFaculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal126cDepartment of Physics, University of Coimbra, Coimbra, Portugal

126dCentro de Física Nuclear da Universidade de Lisboa, Lisboa, Portugal126eDepartamento de Fisica, Universidade do Minho, Braga, Portugal

126fDepartamento de Fisica Teorica y del Cosmos and CAFPE, Universidad de Granada, Granada (Spain), Portugal126gDep Fisica and CEFITEC of Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal

127Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic128Czech Technical University in Prague, Praha, Czech Republic

129Faculty of Mathematics and Physics, Charles University in Prague, Praha, Czech Republic130State Research Center Institute for High Energy Physics, Protvino, Russia

131Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom132aINFN Sezione di Roma, Roma, Italy

132bDipartimento di Fisica, Sapienza Università di Roma, Roma, Italy133aINFN Sezione di Roma Tor Vergata, Roma, Italy

133bDipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy134aINFN Sezione di Roma Tre, Roma, Italy

134bDipartimento di Matematica e Fisica, Università Roma Tre, Roma, Italy

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-27

135aFaculté des Sciences Ain Chock, Réseau Universitaire de Physique des Hautes Energies-Université Hassan II,Casablanca, Morocco

135bCentre National de l’Energie des Sciences Techniques Nucleaires, Rabat, Morocco135cFaculté des Sciences Semlalia, Université Cadi Ayyad, LPHEA-Marrakech, Morocco135dFaculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, Morocco

135eFaculté des sciences, Université Mohammed V-Agdal, Rabat, Morocco136DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers), CEA Saclay (Commissariat à l’Energie Atomique et

aux Energies Alternatives), Gif-sur-Yvette, France137Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, California, USA

138Department of Physics, University of Washington, Seattle, Washington, USA139Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom

140Department of Physics, Shinshu University, Nagano, Japan141Fachbereich Physik, Universität Siegen, Siegen, Germany

142Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada143SLAC National Accelerator Laboratory, Stanford, California, USA

144aFaculty of Mathematics, Physics & Informatics, Comenius University, Bratislava, Slovak Republic144bDepartment of Subnuclear Physics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic

145aDepartment of Physics, University of Cape Town, Cape Town, South Africa145bDepartment of Physics, University of Johannesburg, Johannesburg, South Africa145cSchool of Physics, University of the Witwatersrand, Johannesburg, South Africa

146aDepartment of Physics, Stockholm University, Sweden146bThe Oskar Klein Centre, Stockholm, Sweden

147Physics Department, Royal Institute of Technology, Stockholm, Sweden148Departments of Physics & Astronomy and Chemistry, Stony Brook University, Stony Brook, New York, USA

149Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom150School of Physics, University of Sydney, Sydney, Australia

151Institute of Physics, Academia Sinica, Taipei, Taiwan152Department of Physics, Technion: Israel Institute of Technology, Haifa, Israel

153Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel154Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece

155International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo, Tokyo, Japan156Graduate School of Science and Technology, Tokyo Metropolitan University, Tokyo, Japan

157Department of Physics, Tokyo Institute of Technology, Tokyo, Japan158Department of Physics, University of Toronto, Toronto, Ontario, Canada

159aTRIUMF, Vancouver, British Columbia, Canada159bDepartment of Physics and Astronomy, York University, Toronto, Ontario, Canada

160Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan161Department of Physics and Astronomy, Tufts University, Medford, Massachusetts, USA

162Centro de Investigaciones, Universidad Antonio Narino, Bogota, Colombia163Department of Physics and Astronomy, University of California Irvine, Irvine, California, USA

164aINFN Gruppo Collegato di Udine, Sezione di Trieste, Udine, Italy164bICTP, Trieste, Italy

164cDipartimento di Chimica, Fisica e Ambiente, Università di Udine, Udine, Italy165Department of Physics, University of Illinois, Urbana, Illinois, USA

166Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden167Instituto de Física Corpuscular (IFIC) and Departamento de Física Atómica, Molecular y Nuclear and Departamento de Ingeniería

Electrónica and Instituto de Microelectrónica de Barcelona (IMB-CNM), University of Valencia and CSIC, Valencia, Spain168Department of Physics, University of British Columbia, Vancouver, British Columbia, Canada

169Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, Canada170Department of Physics, University of Warwick, Coventry, United Kingdom

171Waseda University, Tokyo, Japan172Department of Particle Physics, The Weizmann Institute of Science, Rehovot, Israel

173Department of Physics, University of Wisconsin, Madison, Wisconsin, USA174Fakultät für Physik und Astronomie, Julius-Maximilians-Universität, Würzburg, Germany

175Fachbereich C Physik, Bergische Universität Wuppertal, Wuppertal, Germany176Department of Physics, Yale University, New Haven, Connecticut, USA

177Yerevan Physics Institute, Yerevan, Armenia178Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (IN2P3), Villeurbanne, France

179Yerevan Physics Institute, Yerevan, Armenia180Institut für Hochenergiephysik der OeAW, Wien, Austria

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-28

181National Centre for Particle and High Energy Physics, Minsk, Belarus182Universiteit Antwerpen, Antwerpen, Belgium183Vrije Universiteit Brussel, Brussel, Belgium

184Université Libre de Bruxelles, Bruxelles, Belgium185Ghent University, Ghent, Belgium

186Université Catholique de Louvain, Louvain-la-Neuve, Belgium187Université de Mons, Mons, Belgium

188Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil189Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil

190aUniversidade Estadual Paulista, São Paulo, Brazil190bUniversidade Federal do ABC, São Paulo, Brazil

191Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria192University of Sofia, Sofia, Bulgaria

193Institute of High Energy Physics, Beijing, China194State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China

195Universidad de Los Andes, Bogota, Colombia196University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia

197University of Split, Faculty of Science, Split, Croatia198Institute Rudjer Boskovic, Zagreb, Croatia

199University of Cyprus, Nicosia, Cyprus200Charles University, Prague, Czech Republic

201Academy of Scientific Research and Technology of the Arab Republic of Egypt,Egyptian Network of High Energy Physics, Cairo, Egypt

202National Institute of Chemical Physics and Biophysics, Tallinn, Estonia203Department of Physics, University of Helsinki, Helsinki, Finland

204Helsinki Institute of Physics, Helsinki, Finland205Lappeenranta University of Technology, Lappeenranta, Finland

206DSM/IRFU, CEA/Saclay, Gif-sur-Yvette, France207Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France

208Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse,CNRS/IN2P3, Strasbourg, France

209Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France210Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France

211Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia212RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany

213RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany214RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany

215Deutsches Elektronen-Synchrotron, Hamburg, Germany216University of Hamburg, Hamburg, Germany

217Institut für Experimentelle Kernphysik, Karlsruhe, Germany218Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece

219University of Athens, Athens, Greece220University of Ioánnina, Ioánnina, Greece

221Wigner Research Centre for Physics, Budapest, Hungary222Institute of Nuclear Research ATOMKI, Debrecen, Hungary

223University of Debrecen, Debrecen, Hungary224National Institute of Science Education and Research, Bhubaneswar, India

225Panjab University, Chandigarh, India226University of Delhi, Delhi, India

227Saha Institute of Nuclear Physics, Kolkata, India228Bhabha Atomic Research Centre, Mumbai, India

229Tata Institute of Fundamental Research, Mumbai, India230Indian Institute of Science Education and Research (IISER), Pune, India

231Institute for Research in Fundamental Sciences (IPM), Tehran, Iran232University College Dublin, Dublin, Ireland

233aINFN Sezione di Bari, Bari, Italy233bUniversità di Bari, Bari, Italy233cPolitecnico di Bari, Bari, Italy

234aINFN Sezione di Bologna, Bologna, Italy234bUniversità di Bologna, Bologna, Italy

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-29

235aINFN Sezione di Catania, Catania, Italy235bUniversità di Catania, Catania, Italy

235cCSFNSM, Catania, Italy236aINFN Sezione di Firenze, Firenze, Italy

236bUniversità di Firenze, Firenze, Italy237INFN Laboratori Nazionali di Frascati, Frascati, Italy

238aINFN Sezione di Genova, Genova, Italy238bUniversità di Genova, Genova, Italy

239aINFN Sezione di Milano-Bicocca, Milano, Italy239bUniversità di Milano-Bicocca, Milano, Italy

240aINFN Sezione di Napoli, Napoli, Italy240bUniversità di Napoli “Federico II,” Napoli, Italy

240cUniversità della Basilicata, Roma, Italy240dUniversità G. Marconi, Roma, Italy

241aINFN Sezione di Padova, Padova, Italy241bUniversità di Padova, Padova, Italy241cUniversità di Trento, Trento, Italy

242aINFN Sezione di Pavia, Pavia, Italy242bUniversità di Pavia, Pavia, Italy

243aINFN Sezione di Perugia, Perugia, Italy243bUniversità di Perugia, Perugia, Italy

244aINFN Sezione di Pisa, Pisa, Italy244bUniversità di Pisa, Pisa, Italy

244cScuola Normale Superiore di Pisa, Pisa, Italy245aINFN Sezione di Roma, Roma, Italy

245bUniversità di Roma, Roma, Italy246aINFN Sezione di Torino, Novara, Italy

246bUniversità di Torino, Novara, Italy246cUniversità del Piemonte Orientale, Novara, Italy

247aINFN Sezione di Trieste, Trieste, Italy247bUniversità di Trieste, Trieste, Italy

248Kangwon National University, Chunchon, Korea249Kyungpook National University, Daegu, Korea250Chonbuk National University, Jeonju, Korea

251Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea252Korea University, Seoul, Korea

253Seoul National University, Seoul, Korea254University of Seoul, Seoul, Korea

255Sungkyunkwan University, Suwon, Korea256Vilnius University, Vilnius, Lithuania

257National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia258Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico

259Universidad Iberoamericana, Mexico City, Mexico260Benemerita Universidad Autonoma de Puebla, Puebla, Mexico

261Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico262University of Auckland, Auckland, New Zealand

263University of Canterbury, Christchurch, New Zealand264National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan

265National Centre for Nuclear Research, Swierk, Poland266Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland

267Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal268Joint Institute for Nuclear Research, Dubna, Russia

269Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia270Institute for Nuclear Research, Moscow, Russia

271Institute for Theoretical and Experimental Physics, Moscow, Russia272P.N. Lebedev Physical Institute, Moscow, Russia

273Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia274State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia

275University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia276Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-30

277Universidad Autónoma de Madrid, Madrid, Spain278Universidad de Oviedo, Oviedo, Spain

279Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain280CERN, European Organization for Nuclear Research, Geneva, Switzerland

281Paul Scherrer Institut, Villigen, Switzerland282Institute for Particle Physics, ETH Zurich, Zurich, Switzerland

283Universität Zürich, Zurich, Switzerland284National Central University, Chung-Li, Taiwan

285National Taiwan University (NTU), Taipei, Taiwan286Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand

287Cukurova University, Adana, Turkey288Middle East Technical University, Physics Department, Ankara, Turkey

289Bogazici University, Istanbul, Turkey290Istanbul Technical University, Istanbul, Turkey

291Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine292National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine

293University of Bristol, Bristol, United Kingdom294Rutherford Appleton Laboratory, Didcot, United Kingdom

295Imperial College, London, United Kingdom296Brunel University, Uxbridge, United Kingdom

297Baylor University, Waco, Texas, USA298The University of Alabama, Tuscaloosa, Alabama, USA

299Boston University, Boston, Massachusetts, USA300Brown University, Providence, Rhode Island, USA

301University of California, Davis, Davis, California, USA302University of California, Los Angeles, Los Angeles, California, USA

303University of California, Riverside, Riverside, California, USA304University of California, San Diego, La Jolla, California, USA

305University of California, Santa Barbara, Santa Barbara, California, USA306California Institute of Technology, Pasadena, California, USA307Carnegie Mellon University, Pittsburgh, Pennsylvania, USA308University of Colorado at Boulder, Boulder, Colorado, USA

309Cornell University, Ithaca, New York, USA310Fermi National Accelerator Laboratory, Batavia, Illinois, USA

311University of Florida, Gainesville, Florida, USA312Florida International University, Miami, Florida, USA313Florida State University, Tallahassee, Florida, USA

314Florida Institute of Technology, Melbourne, Florida, USA315University of Illinois at Chicago (UIC), Chicago, Illinois, USA

316The University of Iowa, Iowa City, Iowa, USA317Johns Hopkins University, Baltimore, Maryland, USA318The University of Kansas, Lawrence, Kansas, USA319Kansas State University, Manhattan, Kansas, USA

320Lawrence Livermore National Laboratory, Livermore, California, USA321University of Maryland, College Park, Maryland, USA

322Massachusetts Institute of Technology, Cambridge, Massachusetts, USA323University of Minnesota, Minneapolis, Minnesota, USA

324University of Mississippi, Oxford, Mississippi, USA325University of Nebraska-Lincoln, Lincoln, Nebraska, USA

326State University of New York at Buffalo, Buffalo, New York, USA327Northeastern University, Boston, Massachusetts, USA

328Northwestern University, Evanston, Illinois, USA329University of Notre Dame, Notre Dame, Indiana, USA

330The Ohio State University, Columbus, Ohio, USA331Princeton University, Princeton, New Jersey, USA332Purdue University, West Lafayette, Indiana, USA

333Purdue University Calumet, Hammond, Indiana, USA334Rice University, Houston, Texas, USA

335University of Rochester, Rochester, New York, USA336The Rockefeller University, New York, New York, USA

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-31

337Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA338University of Tennessee, Knoxville, Tennessee, USA

339Texas A&M University, College Station, Maryland, USA340Texas Tech University, Lubbock, Texas, USA

341Vanderbilt University, Nashville, Tennessee, USA342University of Virginia, Charlottesville, Virginia, USA

343Wayne State University, Detroit, Michigan, USA344University of Wisconsin, Madison, Wisconsin, USA

aDeceased.bAlso at Department of Physics, King’s College London, London, United Kingdom.cAlso at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan.dAlso at Novosibirsk State University, Novosibirsk, Russia.eAlso at TRIUMF, Vancouver, BC, Canada.fAlso at Department of Physics, California State University, Fresno, CA, USA.gAlso at Department of Physics, University of Fribourg, Fribourg, Switzerland.hAlso at Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Portugal.iAlso at Tomsk State University, Tomsk, Russia.jAlso at CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.kAlso at Università di Napoli Parthenope, Napoli, Italy.lAlso at Institute of Particle Physics (IPP), Canada.

mAlso at Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom.nAlso at Department of Physics, St. Petersburg State Polytechnical University, St. Petersburg, Russia.oAlso at Louisiana Tech University, Ruston, LA, USA.pAlso at Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain.qAlso at Department of Physics, National Tsing Hua University, Taiwan.rAlso at Department of Physics, The University of Texas at Austin, Austin, TX, USA.sAlso at Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia.tAlso at CERN, Geneva, Switzerland.uAlso at Georgian Technical University (GTU),Tbilisi, Georgia.vAlso at Ochadai Academic Production, Ochanomizu University, Tokyo, Japan.wAlso at Manhattan College, New York, NY, USA.xAlso at Institute of Physics, Academia Sinica, Taipei, Taiwan.yAlso at LAL, Université Paris-Sud and CNRS/IN2P3, Orsay, France.zAlso at Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan.aaAlso at School of Physics, Shandong University, Shandong, China.bbAlso at Moscow Institute of Physics and Technology State University, Dolgoprudny, Russia.ccAlso at Section de Physique, Université de Genève, Geneva, Switzerland.ddAlso at International School for Advanced Studies (SISSA), Trieste, Italy.eeAlso at Department of Physics and Astronomy, University of South Carolina, Columbia, SC, USA.ffAlso at School of Physics and Engineering, Sun Yat-sen University, Guangzhou, China.ggAlso at Faculty of Physics, M.V.Lomonosov Moscow State University, Moscow, Russia.hhAlso at National Research Nuclear University MEPhI, Moscow, Russia.iiAlso at Department of Physics, Stanford University, Stanford, CA, USA.jjAlso at Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary.kkAlso at Department of Physics, The University of Michigan, Ann Arbor, MI, USA.llAlso at Discipline of Physics, University of KwaZulu-Natal, Durban, South Africa.

mmAlso at University of Malaya, Department of Physics, Kuala Lumpur, Malaysia.nnAlso at Vienna University of Technology, Vienna, Austria.ooAlso at CERN, European Organization for Nuclear Research, Geneva, Switzerland.ppAlso at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.qqAlso at Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse, CNRS/IN2P3,Strasbourg, France.rrAlso at National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.ssAlso at Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.ttAlso at Universidade Estadual de Campinas, Campinas, Brazil.uuAlso at Centre National de la Recherche Scientifique (CNRS)–IN2P3, Paris, France.vvAlso at Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3–CNRS, Palaiseau, France.wwAlso at Joint Institute for Nuclear Research, Dubna, Russia.xxAlso at Ain Shams University, Cairo, Egypt.

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-32

yyAlso at British University in Egypt, Cairo, Egypt.zzAlso at Helwan University, Cairo, Egypt.aaaAlso at Suez University, Suez, Egypt.bbbAlso at Cairo University, Cairo, Egypt.cccAlso at Fayoum University, El-Fayoum, Egypt.dddAlso at Université de Haute Alsace, Mulhouse, France.eeeAlso at Brandenburg University of Technology, Cottbus, Germany.fffAlso at Institute of Nuclear Research ATOMKI, Debrecen, Hungary.

gggAlso at Eötvös Loránd University, Budapest, Hungary.hhhAlso at University of Debrecen, Debrecen, Hungary.iiiAlso at Wigner Research Centre for Physics, Budapest, Hungary.jjjAlso at University of Visva-Bharati, Santiniketan, India.

kkkAlso at King Abdulaziz University, Jeddah, Saudi Arabia.lllAlso at University of Ruhuna, Matara, Sri Lanka.

mmmAlso at Isfahan University of Technology, Isfahan, Iran.nnnAlso at University of Tehran, Department of Engineering Science, Tehran, Iran.oooAlso at Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran.pppAlso at Università degli Studi di Siena, Siena, Italy.qqqAlso at Purdue University, West Lafayette, IN, USA.rrrAlso at International Islamic University of Malaysia, Kuala Lumpur, Malaysia.sssAlso at Consejo National de Ciencia y Tecnologia, Mexico, Mexico.tttAlso at Institute for Nuclear Research, Moscow, Russia.

uuuAlso at Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia.vvvAlso at St. Petersburg State Polytechnical University, St. Petersburg, Russia.

wwwAlso at National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia.xxxAlso at California Institute of Technology, Pasadena, CA, USA.yyyAlso at Faculty of Physics, University of Belgrade, Belgrade, Serbia.zzzAlso at Facoltà Ingegneria, Università di Roma, Roma, Italy.aaaaAlso at National Technical University of Athens, Athens, Greece.bbbbAlso at Scuola Normale e Sezione dell’INFN, Pisa, Italy.ccccAlso at University of Athens, Athens, Greece.ddddAlso at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland.eeeeAlso at Institute for Theoretical and Experimental Physics, Moscow, Russia.ffffAlso at Albert Einstein Center for Fundamental Physics, Bern, Switzerland.

ggggAlso at Adiyaman University, Adiyaman, Turkey.hhhhAlso at Mersin University, Mersin, Turkey.iiiiAlso at Cag University, Mersin, Turkey.jjjjAlso at Piri Reis University, Istanbul, Turkey.

kkkkAlso at Gaziosmanpasa University, Tokat, Turkey.llllAlso at Ozyegin University, Istanbul, Turkey.

mmmmAlso at Izmir Institute of Technology, Izmir, Turkey.nnnnAlso at Mimar Sinan University, Istanbul, Istanbul, Turkey.ooooAlso at Marmara University, Istanbul, Turkey.ppppAlso at Kafkas University, Kars, Turkey.qqqqAlso at Yildiz Technical University, Istanbul, Turkey.rrrrAlso at Hacettepe University, Ankara, Turkey.ssssAlso at Rutherford Appleton Laboratory, Didcot, United Kingdom.ttttAlso at School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom.

uuuuAlso at Instituto de Astrofísica de Canarias, La Laguna, Spain.vvvvAlso at Utah Valley University, Orem, UT, USA.

wwwwAlso at University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.xxxxAlso at Argonne National Laboratory, Argonne, IL, USA.yyyyAlso at Erzincan University, Erzincan, Turkey.zzzzAlso at Texas A&M University at Qatar, Doha, Qatar.aaaaaAlso at Kyungpook National University, Daegu, Korea.

PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015

191803-33