CDF: Prospettive e upgrades · 2003-09-23 · Pisa: Settembre 2003 F. Bedeschi, INFN-Pisa 1 CDF: Prospettive e upgrades vStato Tevatron e CDF vRisultati recenti e prospettive vRun

Pisa: Settembre 2003 F. Bedeschi, INFN-Pisa

1

CDF: Prospettive e upgrades

v Stato Tevatron e CDFv Risultati recenti e prospettivev Run IIB:Ø Situazione generaleØ Stato progetti a partecipazione italianaØ L’upgrade del CPR (v. presentazione S. Lami)

v L’upgrade di SVT (v. presentazione di P. Giannetti)v Calcolo (v. presentazione S. Belforte)v Sommario richieste finanziarie

SOMMARIOINFN - Riunione della

CSN 1Lecce

24 Settembre 2003Franco BedeschiINFN-Pisa

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2TeV Luminosity(current situation)

vPeak luminosity ØBest 5.2x1031

vDelivered/on tapeØ330/260 pb-1

Delivered

On tape

5x1031

Luminosity

Integrated

Initialinstantaneous




3

Tev 2003 Luminosity

v Goals for 2003 Ø Base goals:

200 pb-1 in FY 200310 pb-1/wk end of 2003

5.4x1031 typicalØ Stretch goals:

320 pb-1 in FY 200315 pb-1/wk end of 2003

7.6x1031 typical (~max achievable without Recycler)

Ø Integrated luminosity goal achieved, but …

Half of shutdown in FY04Avg. lum. lower than predicted

v FY04: Double data set

~150 pb-1

As of 5/6/03

~250 pb-1

As of 9/3/03




4

CDF operations

v All CDF operating reliablyØ Silicon stable

v Data taking efficiency highØ 80-90% typical

v Some limitations in L1 trigger output rateØ < 20 kHz achieved

~ 50 kHz designForce prescale of B physicsProblem gets worse at higher luminosity (more in Paola’s talk)

Ø Requires work on DAQ/L2vMassive Italian effort on SVTv L00 aligned and improving

resolutionNow

Hadronic Bs trigger




5

SVT trigger improvements in 2003 (at 0 cost)

vWhatever could be done with no upgrade has already been done!Ø 4/5 : 1.5x efficiency, more uniform coverage, avoid efficiency change while

single SVX ladder are out of DAQ for a few days - CarosiØ 3/3 : recover another SVX wedge/barrel - CarosiØ AMS firmware optimization : saves 700nsec – BelforteØ Avoid fitting tracks 1.5<Pt<2 : 30% less to fit – BelforteØ Skip events that do not require SVT al L2 (hight Pt jets, MET and leptons):

saves 1 microsec (more as L increases) – Belforte, RescignoØ Road Warrior: removes duplicate fit combination for 4/5, saves 30% of time

Algorithm, timing studies, simulation, proof of feasibility - Annovi, Belforte, Catastini, CerriFirmware – Spinella (this fall)Money (~60k$) - Fermilab




6

Results from L00

vClear D resolution improvements with L00ØMost gain at low pt and in areas with much materialØStill room for improvement of alignment




7

Physics Results

vData used for summer conferences 2003ØData set collected February 02 – May 03Ø230 pb-1 delivered, 170 pb -1 on tape, <140 pb -1 used for analysis à now 330 pb-1 delivered, 260 pb-1 on tape

Some preliminary results available at higher statistics

vMuch progress since May 03Ø Italian group is giving key contributionsØWill cover only highlights with emphasis on Italian work

Top quarkEWKB physics

Discuss Bs mixing reach as example of trigger issues




8

Italian group contributions

v B/charm physicsØ Topics: Bàhh (ACP, BR), Λbàpπ search, BsàDsπ & lνDs (preparatory to

Bs mixing), Bsàφφ, BdàφK*, BàφK (ACP, BR), D0àhh (BR, ACP)Ø Groups involved: Padova, Pisa, Roma, Trieste

v High pt physicsØ Topics: Zàbb, Higgs searches, top physics, hadronic top, top backgrounds,

b-tagging, W+jets, forward W’sØ Groups involved: Bologna, Padova (Trento), Pisa, Roma

v Responsibilities:Ø Conveners of B physics subgroupsØ Convener of top groupØ Members of important review committees (eg. Higgs reach)

vMost work in close cooperation with other non-Italian groupsvMost work in close cooperation among the Italian groups




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Top (di-leptons)

2 high pT leptons (e,µ,τ,iso track)

2 central jetsLarge Missing ET

HT: scalar sum of all the measured“objects” ET’s (leptons,jets)




10

Top (l+jets)

1 high pT lepton(e,µ)

≥3 central jets

Large Missing ET




11

Top x-section

(syst)(stat)7.6 1.51.9

3.83.1

+−

+−

1.7(syst)3.4(stat)7.3 ±±

0.9(syst)1.9(stat)5.3 ±±

2.1(syst)1.8(stat)5.1 ±±

0.9(lum)(syst)(stat)8.7 2.72.0

6.44.7 ±+

−+−

0.8(lum)(syst)(stat)8.1 1.61.4

2.22.0 ±+

−+−

0.5(lum)(syst)(stat)4.6 2.12.0

3.12.7 ±+

−+−

1.1(lum)(syst)(stat)11.4 2.01.8

4.13.5 ±+

−+−

0.8(lum)(syst)(stat)8.0 1.71.5

2.42.1 ±+

−+−

0.7(lum)(syst)(stat)7.4 2.11.8

4.43.6 ±+

−+−

1.1(lum)(syst)(stat)10.8 2.12.0

4.94.0 ±+

−+−




12

Top mass

212.79.4 GeV/c 7.1(syst)(stat)177.5 ±+

−

Mass in lepton+jets channelwith a b-tagged jet Mass in dilepton channel

217.416.9 GeV/c 7.9(syst)(stat)175.0 ±+

−

CDF RunII preliminary, 108 pb-1CDF RunII preliminary, 126 pb-1

6 events

Data 22 evts




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Hadronic top

vWork in progress!ØTop mass distribution

with 165 pb-1 of double tagged multi-jet eventsØBackground from 0 tag

sampleØMain goals:

Top x-section in hadronic channelTop mass measurement in hadronic channel




14

Zàbb

vWork in progressØ~70 pb-1ØUpdate soon with

>x2 statisticsØGood

understanding of sample compositionØTrigger updated

vCritical signal for:ØTop mass accuracyØ Improving bb di-jet

mass resolution

2 tags2 tagssubtracted

1 tag 1 tagsubtracted




15

Forward W’s

vCurrent blessed result with ~70 pb-1

ØUpdate soonØWorking on cross

section systematicsvGoals:ØMeasure x-section in

forward regionσW = 2.81±0.39 nb

Ø Include forward W’s in top and other high pt analyses




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ψ 3870

v ψππ narrow resonance at ~ 3870 MeV reported by Belle at Lepton-Photon Ø 34.4±6.5 eventsØ May be an L=2 cc state

v CDF has searched for this state in its large sample of ψ (>2M) and found it too!Ø 8.5 σ effectØ Hint seen in run 1 data




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B lifetimes

vComplete set of lifetime measurements with exclusive B statesØBu, Bd show reliabilityØBs already better than WASpecies Bu Bd Bs Λ bCDF τ (ps) 1.63±0.050±0.04 1.51±0.060±0.02 1.33±0.14±0.02 1.25±0.260±0.10HFAG τ (ps) 1.65±0.014 1.53±0.013 1.44±0.17 1.23±0.077

Bu Bs




18

Bs à lνDs

v Collecting the high statistics samples of Bàlepton + CharmØ Still working on lifetime

systematicsØ This sample can be used

also for Bs mixing




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Hadronic B’s (2 body)v Yields doubledØ Trigger work!Ø 871 events in peak!Ø Now σeff ~ 6 pb

vMeasurements with 68 pb-1 only:Ø Will update for winter

conferencesSimulation

Bd→KπBs→KKBd→π πBs→K π

µ = 5.252(2) GeV/c2

σ = 41.1(1.9) MeV/c2

M(ππ)

L~180 pb-1

Tight cuts871 eventsLoose cuts1766 events




20

Hadronic B’s (two body)

v Current measurements and projections (68 pb-1)Ø fs BR(BsàKK)/fd BR(BdàKπ) = 0.74±0.2±0.22

First measurement! CDF onlyExpect 10% error by next summer

Ø BR(Bdàππ)/BR(BdàKπ) = 0.26±0.11±0.06Belle/BaBar errors: 0.033/0.035 LP2003Could reach above accuracy by fall 2004

Ø ACP(BdàKπ) = 0.02 ± 0.15 ± 0.017Belle error: 0.035 LP2003

Ø ACP(Bdàππ) : need ~2 fb-1 for γ measurement to 10o

10o is still statistics limited

v Expect ~x2 error reduction with current statistics (180 pb-1)Ø Systematic too with better dE/dx




21

BR(B±à φK±) at CDF

First time at CDF : B±à φK±

BR( B±à φK± ) ———————— = 0.0068 ± 0.0021(stat.) ± 0.0007(syst.)

BR( B±à J/ψK± )

§ 23 ± 7 events§ 120 pb-1




22

Hadronic B’s (many bodies)

v Understanding backgrounds and yields with large MC samples

B+




23

Hadronic B’s (many bodies)

v Understand hadronic Bs yield. Measure BR: NEW!Ø BR(BsàDsπ) = (4.8±1.2(stat)±1.8(BR)±0.8(sys)±0.6 (fs/fd))x10-3




24

Bs mixing expectations

v Expectations extrapolating from current dataØ Still large uncertainties on:

Final event yield (depends on upgrades)Max lifetime resolution achievableMax εD2 (tagging power) achievable

Ø Make very conservative assumptions!

v Sensitivity = ∆ms/σØ 2σ sensitivity for = 15 ps-1 with ~0.5 fb-1

Surpass current world limitØ 5σ sensitivity for = 18 ps-1 with 1.7 fb-1

Ø 5σ sensitivity for = 24 ps-1 with 3.2 fb-1

v Current constraints:Ø Lower limit LEP+SLD: ∆ms >15 ps-1 WAØ Constraints from global fits: ∆ms = 21 ± 4 ps-1 (Durham 2003)




25

Bs yield

vAt higher luminosity need more L1 BW to preserve current yieldvExpect ~2000 ev/fb-1

using additional Dsdecay modes

Current performance

4x1031 6x1031

8x1031




26

Tev goals beyond 2003

v Fermilab has scaled down its plans for luminosity in June 2003Ø Silicon upgrade canceled!

No long shutdown in 2005Ø Design plan max luminosity: 2.94x1032

v No recycler ~ base plan0.080.08FY02

8.564.41Total

2.421.16FY09

2.371.14FY08

1.530.63FY07

0.890.50FY06

0.670.39FY05

0.380.31FY04

0.220.20FY03

Design planLuminosity/yr (fb-1)

Base plan luminosity/yr (fb-1)

Year

0123456789

0 1 2 3 4 5 6 7 8 9 10

End FY

fb-1

Base planDesign plan




27

Impact on Higgs reach

v Reach for SM Higgs and other “new” physics searches affected by factor 2-3 reduction in expected total integrated luminosity (relative to 15 fb-1)

4.41 fb-1 base plan

8.56 fb-1 design plan

Sensitivity re-evaluated in June 2003Slightly better

Retain sensitivity to a low mass SM Higgs




28

Impact on physics program

vEven 2 fb-1 represents x20 more luminosity than run 1ØMajor CDF/D0/Tevatron upgrade was fully justified by this

expected integrated luminosityvWe will get more than 2 fb-1, but not 15 fb-1 as the lab

made us hope for some timevImportant to make best of available luminosityØAll other upgrades needed for this

CDF is re-evaluating physics priorities and role of upgrades

ØFull support from Witherell, P5 and PAC on all other upgrades




29

Upgrade del rivelatore al Silicio per CDF Run IIb

•Il progetto e’ stato cancellato in fase di Preproduzione:ØTutte le parti gia’ a SiDet in quantita’ (~15% del totale)ØSensori da HPK al terzo mese di produzione (~350 a SiDet)Ø“On schedule” per finire a Maggio ‘05 (18 mesi di anticipo rispetto alla data ufficiale di Nov ‘06).ØOttimi risultati su svx4 chip e ibridi §Costi stimati ridotti notevolmente

•Progetto di chiusura:ØCostruire 15 staves => installare nel prototipo di Barrel => el./mech. testsØCostruire 5 moduli di L0 => installare nelCF support structure => el./mech. tests ØInstallare L0 nel Barrel => e./mech. TestsØCirca 6 mesi con costi minimi (quasi tuttolabor cost)




30

Summary of upgrade projects

v Calorimetry upgradesØ New central preradiator (CPR2) (see talk by Stefano Lami) (*)Ø Add timing to EM calorimeters (*)

v Tracking upgradesØ Full replacement of all silicon systems inside ISL (*)

v Trigger upgradesØ Improve resolution of L1 track triggerØ Rebuild global L2Ø Increase event builder throughputØ SVT upgrade (RW & associative memories) (see talk by P. Giannetti) (*New)

v DAQ upgradesØ TDC upgrade (speed up chamber readout)Ø Double SRC (speed up silicon readout) Ø CSL upgrade (double data logging bandwidth)

(*) Activities with contributions from Italian group




31

Requests for upgrades

v Silicon à NONEØ Save 130 kEuro in 2003 + 150 kEuro in 2004! Ø Save 100 kEuro for additional SVT merger boards

v CEM timing à NONEØ Funding complete

v CPR2 (see Lami’s talk):Ø 100 kEuro in 2003 from SJ (Pisa)Ø 82 kEuro in 2004 (Pisa)

v SVT ass. Mem. Board upgrade (NEW see Giannetti’s talk)Ø 120 kEuro in 2004 (Ferrara)Ø 60 kEuro in 2004 (Pisa)Ø 150 kEuro in 2005

Total cost 330 kEuro




32

Group composition

vCDF Italian group has grown by 20% relative to last yearØGood to have data!ØFuture activities important to keep the group together

2004 2004 2003 2003 2002 2002Fisici Tecnol. Totale Totale Totale Totale Totale Totale

Sezione Numero FTE Numero FTE numero FTE numero FTE numero FTEBologna 8 6.7 1 0.5 9 7.2 9 7.4 9 7.3CDF1-LNF 1 1 0 0 1 1 1 1 1 1Ferrara 3 0.7 1 0.1 4 0.8LNF 6 4 1 0.4 7 4.4 6 3.7 6 4.4Padova 15 11.3 0 0 15 11.3 13 9.2 14 9Pavia 1 1 0 0 1 1 1 0.7 1 1Pisa 32 26.9 11 6.6 43 33.5 33 25.4 28 20.6Roma1 11 9.5 2 1.5 13 11 13 11.1 12 10.1Trieste 5 3.6 0 0 5 3.6 5 3.7 3 2.1Udine 3 2.3 1 0.5 4 2.8 3 1.8 3 1.8Totale 04 85 67 17 9.6 102 76.6Totale 03 73 58.5 11 5.5 84 64.00Totale 02 68 52.2 9 5.1 77 57.3




33

FY 2003 missioni/consumi

Sezione MI ME ConsumiNuovi fin. Nuovi fin. Sblocchi Sblocchi

BO 17 10LNF 16LNF-dot 7PD 35PV-dotPI 5 50 100RM1 40TSUD 1 25




34

MOF

vNo developments since last meeting of IFC in AprilvNew IFC meeting deferred to end of October (maybe)ØPropose to fund as last year (250 kEuro)

20% increase in size of CDF Italian group overcompensates changein dollar exchange rate

ØThere may be a need for adjustment after the October IFC meeting if some agreement is found




35

Summary of 2004 requests

Missioni Interne Missioni Estere Consumi Inventario Costruzione apparatiTotaliSEZ. Richieste Assegn. Richieste Assegn. Richieste Assegn. Richieste Assegn. Richieste Assegn. Richieste Assegn.

2004 2003 2004 2003 2004 2003 2004 2003 2004 2003 2004 2003BO 7.2 7 134.2 113.5 30.8 30 0 15 15 11 187.2 176.5FE-DOT 2 5 0 0 120 127 0LNF 4.4 4 100.6 91 11.6 7 5 4 0 120 121.6 226LNF-DOT 2 1 40 39 10 1.5 0 0 0 0 52 41.5PD 11.5 10 214.7 196 22.2 25 11 5.5 0 0 260.4 239PI 30 20 624.5 525 290 290 46 11.5 142 110 1137.5 958.5PV-DOT 2 2 27 8 2 1 0 0 0 0 31 11RM 13 6 308 233 60 18 20.5 12 0 0 401.5 269TS 6 4 100.5 61.5 11.5 7 291.5 267.5 0 0 413.5 340UD 6 3 97 88 8 4 6 1 0 10 119 106TOTALE 84.1 57 1651.5 1355 446.1 383.5 380 316.5 277 251 2850.7 2367.5

Includes all adjustments made after presentation of estimates in July 2003




36




37

TeV Luminosity(old slide May 13, 2003)

vPeak luminosity still low but improvingØBest 4.2x1031

vDelivered/on tapeØ230/170 pb-1

Delivered

On tape

4x1031

LuminosityIntegrated

Initialinstantaneous




38

Tev luminosity

v7 pb-1 /wk typicalØPeak 9.7 pb-1




39

Tev goals beyond 2003

vFermilab long range plan (M.Witherell P5 presentation – March 26, 2003)




40

Status of CDF

v Detector:Ø All systems commissioned and taking

good quality dataISL: more cooling lines opened during the January shutdown!

Only 1 cooling line (4% of total) remains plugged

Silicon (hardware/trigger) in general much more stable and reliable~90 % of all silicon systems currently taking dataL1 accept rate limitation removedSome unrecoverable damage is piling up

• % powered• % good• % bad• % error rate

January 03shutdown




41

New silicon

vStatus similar to May 03




42

Status of CDF

Early June 2002 March 2003

Silicon trigger coverage




43

Status of CDF

v SVX electronics very delicateØ Still learning how

to protect it from further damage

Understand now much better sources of damage

Ø Some concern about possible continuous degradation over long periods of time




44

L1 triggerv Require trigger deadtime < 5%v B triggers ~ 80% of L1, 50% L2/3Ø Fake rates higher than predictions

Level 1 Predictions

0

5

10

15

20

25

30

35

40

45

50

0 10 20 30 40 50 60 70 80 90 100Luminosity (e30)

Rat

e (k

Hz)

Predicted L1 rateVs luminosity

CurrentMax. lum

~18 kHz

18 kHz

4/4




45

Bs trigger efficiency

vHard work has improved yields significantly




46

Additional Bs channelsvBsà Ds π (Dsà πππ)

~30 events




47

Measuring ∆ms

vIngredients:ØS = signal yieldØS/B = signal/BackgroundØσt = proper lifetime resolutionØ εD2 = flavor tagging power

ε = flavor tagging efficiencyD = flavor tagging dilution = 1-2w (w = flavor mistagging probability)

( )22

2

2

s tmS D SSignificance eS B

σε ∆−

=+




48

Bs mixing

vLifetime resolutionØ67 fs NOWØ50 fs with event by event vertex and L00

vFlavor tagging studies in progressØLarge errors still on εD2 measurementsØTotal ~ 6% in Run 1 sin(2β) analysisØNow we have kaon tagging, but much more materialØNN like techniques could help tooØAssume (very conservatively!):

εD2 = 4% now (only SST, jet charge, lepton tags)εD2 = 5% later after including kaon tags




49

Bs mixing

v 5σ measurementØ Feasible with moderate

improvements in 2 fb-1

v Can beat current world limit with 500 pb-1 and “current” performance

v Harder than expected: needs lot of work and luminosity/detector upgrades 0

5

10

15

20

25

30

35

0 500 1000 1500 2000

Moderate improvements

SM central value

Now

xs

pb-1




50

Tevatron goals beyond 2003

vDuring the June PAC review the issue of the usefulness of the silicon upgrade was seriously considered, but deferred to after the July accelerator reviewØOther upgrades regarded as “…already desirable at

considerably lower luminosities.”vJuly DOE review of accelerator (Lehman) found the

design goals ambitious and the base goals rather safevOn September 3rd Witherell cancels silicon upgrade, but ØRun II will still have highest priority. Resources recovered

will be spent to improve TevatronØCommitted “…to complete the non-silicon parts of the CDF

and D0 upgrades.”




51

Impact of new luminosity expectations

vImpact of smaller luminosity expectations can be reduced by appropriate upgradesØMost run IIb upgrades also help to make the best use of

available luminosityTrigger/DAQ upgrades:

Reduce fakes and therefore prescales for all B physics triggersIncrease bandwidth gaining effective cross-section for prescaled triggers

CEM timing and CPR upgrade:Improve S/N à allow reduced trigger/analysis thresholds for high pt

vCDF and the laboratory fully support all the non-silicon upgrades



Documents

CDF: Prospettive e upgrades · 2003-09-23 · Pisa: Settembre 2003 F. Bedeschi, INFN-Pisa 1 CDF: Prospettive e upgrades vStato Tevatron e CDF vRisultati recenti e prospettive vRun