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The MINER n A Experiment. Heidi Schellman for the MINER n A collaboration. The MINER n A Experiment Red = HEP , Blue = NP, Black = Theorist. D. Drakoulakos, P. Stamoulis, G. Tzanakos, M. Zois University of Athens, Athens, Greece C. Castromonte, H. da Motta, M. Vaz, J.L.Palomino - PowerPoint PPT Presentation
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4/7/2008 DIS 2008 - Minerva 1
The MINERA Experiment
Heidi Schellman for the MINERA collaboration
4/7/2008 DIS 2008 - Minerva 2
The MINERA Experiment Red = HEP, Blue = NP, Black = Theorist
D. Drakoulakos, P. Stamoulis, G. Tzanakos, M. ZoisUniversity of Athens, Athens, Greece
C. Castromonte, H. da Motta, M. Vaz, J.L.PalominoCentro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
D. Casper, J. Dunmore, C. Regis, B. ZiemerUniversity of California, Irvine, California
E. PaschosUniversity of Dortmund, Dortmund, Germany
M. Andrews, D. Boehnlein, N. Grossman, D. A. Harris, J. Kilmer, J.G. Morfin, A. Pla-Dalmau, P. Rubinov, P. Shanahan
Fermi National Accelerator Laboratory, Batavia, Illinois
J. Felix, G. Moreno, M.Reyes, G ZavalaUniversidad de Guanajuato, Guanajuato, Mexico
I.Albayrak, M..E. Christy, C.E .Keppel, V. TvaskisHampton University, Hampton, Virginia
A, Butkevich, S.KulaginInstitute for Nuclear Research, Moscow, Russia
I. Niculescu. G. .NiculescuJames Madison University, Harrisonburg, Virginia
W.K. Brooks, A. Bruell, R. Ent, D. Gaskell, W. Melnitchouk, S. WoodJefferson Lab, Newport News, Virginia
E. MaherMassachusetts College of Liberal Arts, North Adams, Massachusetts
R. GranUniversity of Minnesota-Duluth, Duluth Minnesota
D. Buchholtz, B. Gobbi, H. SchellmanNorthwestern University, Evanston, IL
S. Boyd, S. Dytman, M.-S. K, D. Naples, V. PaoloneUniversity of Pittsburgh, Pittsburgh, Pennsylvania
L. Aliaga, J.L. Bazo, A. Gago, Pontificia Universidad Catolica del Peru, Lima, Peru
A. Bodek, R. Bradford, H. Budd, J. Chvojka,,P. de Babaro, S. Manly, K. McFarland, J. Park, W. Sakumoto, J. Seger, J. Steinman
University of Rochester, Rochester, New York
R. Gilman, C. Glasshausser, X. Jiang, G. Kumbartzki,R. Ransome, E. Schulte
Rutgers University, New Brunswick, New Jersey
S. KoppUniversity og Texcas-Austin, Texas
D. Cherdack, H. Gallagher, T. Kafka, W.A. Mann, W. OliverTufts University, Medford, Massachusetts
R. Ochoa, O. Pereyra, J. SolanoUniversidad Nacional de Ingenieria. Lima, Peru
M. Kordosky, J. Nelson William and Mary College, Williamsburg, Virginia
4/7/2008 DIS 2008 - Minerva 3
The NuMI Beam Configurations.
For MINOS, the majority of the running will be in the “low-energy” (LE) configuration.
Post-MINOS: NOA would use the ME beam, MINERA would prefer LE (≥ one year) and ME
beam
4/7/2008 DIS 2008 - Minerva 4
LE-configuration: Epeak = 3.0 GeV rate = 60 K events/ton/1020
pot ME-configuration: Epeak = 7.0 GeV,
rate = 230 K events/ton/1020 pot
HE-configuration: Epeak =12.0 GeV,
rate = 525 K events/ton/1020 pot
Expected Event statistics for a generic experiment.
With E-907 at Fermilab to measure particlespectra from the NuMI target, expect to know neutrino flux to ≈ ± 5%.
4/7/2008 DIS 2008 - Minerva 5
“MINERvA” in the NUMI beamline
4/7/2008 DIS 2008 - Minerva 6
Basic MINERvA Detector
Active core is segmented solid scintillator Tracking (including low momentum recoil
protons) Particle identification 3 ns (RMS) per hit timing
(track direction, stopped K±) Core surrounded by electromagnetic
and hadronic calorimeters Photon (0) & hadron energy
measurement Nuclear targets located in front of main
detector MINOS Near Detector as muon catcher
4/7/2008 DIS 2008 - Minerva 7
Complete MINERA Experimental Set-up
LHe0.25 t
VetoWall
Cryotarget
FullyActive Target:8.3 tons
NuclearTargets:6.2 tons(40% scint.)
DS HCAL:30 tons
DS ECAL:15 tons
Side HCAL: 116 tons
Side ECAL Pb: 0.6 tons
4/7/2008 DIS 2008 - Minerva 8
Event Sample with 4x1020 Protons on Target LE & 12x1020 POT ME beam
TargetTarget Fiducial Vol. Fiducial Vol. Expected CCExpected CC (tons)(tons) Yields Yields
Scint. 3 9.0MHe 0.2 0.6MC 0.15 0.4MFe 0.7 2.0MPb 0.85 2.5M
4/7/2008 DIS 2008 - Minerva 9
MINERvA Physics Goals
Axial form factor of the nucleon Accurately measured over a wide Q2 range.
Resonance production in both NC & CC neutrino interactions Study of “duality” with neutrinos
Coherent pion production Strange particle production Parton distribution functions (DIS) at high x Generalized parton distributions Nuclear dependence of all of these
Expect some significant differences for -A vs e/-A nuclear effects
4/7/2008 DIS 2008 - Minerva 10
MINERvA Detector Module
Inner Detector (ID) Hexagonal X, U, V planes for 3D tracking, Active Scintillator Target
Outer Detector (OD)“Towers” of iron & scintillator for hadron calorimetry
Lead for EM calorimetry
4/7/2008 DIS 2008 - Minerva 12
MINERvA compared to NuTeV
Moore’s law for electronics 800 channels 32,000 for less $
5 cm
4/7/2008 DIS 2008 - Minerva 13
Simulated events and particles
Quasielastic event
n p
0
Resonance production
p + - p 0
+
4/7/2008 DIS 2008 - Minerva 14
Neutral Pions
Photons cleanly identified and tracked
π0 energy res.: 6%/√E (GeV)
For coherent pion production, the angular distribution is dominated by physics not resolution
4/7/2008 DIS 2008 - Minerva 15
Particle Identification
p
X2 differences between right and best wrong hypothesis Particle ID by dE/dx in strips and Particle ID by dE/dx in strips and
endpoint activityendpoint activity
4/7/2008 DIS 2008 - Minerva 16
MINERA Physics: Low Energy Neutrino Scattering
We will be making precisionmeasurements of lowenergy neutrino crosssections:
Contributions to total cross section: TOT = QE+RES+DIS
QE: Quasi-elastic
RES: Resonance
DIS: Deep Inelastic Scattering
Inelastic, Low-multiplicity final states
Inelastic, High-multiplicity final states
Lipari, Lusignoli and Sartogo, PRL 74, 4384 (1995)
4/7/2008 DIS 2008 - Minerva 17
MINERA measurements
Main CC Physics Topics (Statistics in active target only - CH)
Quasi-elastic 0.8 M events
Resonance Production 1.7 M total Transition: Resonance to DIS 2.1 M events DIS, Structure Funcs. and high-x PDFs 4.3 M DIS
events Coherent Pion Production 89 K CC /
44 K NC Strange and Charm Particle Production > 240 K
fully reconstructed events Generalized Parton Distributions ~ 10 K
eventsAll absolute cross sectionresults will be limited by the flux normalization (~5%)
4/7/2008 DIS 2008 - Minerva 18
Precision
Quasi Elastic
MINERvA Quasielastic
4/7/2008 DIS 2008 - Minerva 19
A-dependence in scattering
A dependence observed in e/ DIS
Could be different for neutrinos Presence of axial-vector
current. Different nuclear effects
for valence and sea leads to different
shadowing for xF3 compared to F2.
0.7
0.8
0.9
1
1.1
1.2
0.001 0.01 0.1 1
EMCNMCE139E665
shadowing EMC effect
Fermi motion
x sea quark valence quark
If we understand at 10-20 GeVWill that help at 100 GeV?Comparing with JLAB will help.
4/7/2008 DIS 2008 - Minerva 20
Low energy inclusive and exclusive cross sections for neutrino oscillations
0 NC important for oscillation experiments
e
OR
?
4/7/2008 DIS 2008 - Minerva 21
MINERvA schedule
MINERvA received DOE critical decision (CD) 3a approval Spring 07 Authorization for advanced purchases Beginning purchases for PMT’s, WLS fiber, Clear fiber, PMT
box components, steel and lead Approved for full construction authorization (CD 3b) Fall 07
Included in FY08 Presidential Budget for Department of Energy
Construction is beginning Detector installation and commissioning in 2009
4/7/2008 DIS 2008 - Minerva 22
MINERvA Test Beam Detector
40 planes, XUXV orientation as in full MINERvA Removable lead and iron absorbers. In light-proof box Size will be smaller: ~1.2 x 1.2 m2
Requesting Fermilab Test Beam Facility Upgrade to reach lower /K/p momenta of order 250 MeV
Test Beam run in the M-Test beam to be scheduled for late summer this year
4/7/2008 DIS 2008 - Minerva 23
We’ll bring results to DIS 2010