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MINER  A: Understanding Neutrino-Nucleus Interactions

MINER  A: Understanding Neutrino-Nucleus Interactions. Jesse Chvojka University of Rochester June 4 th , 2008. Overview. Motivation for studying neutrino interactions in the few GeV region What is MINER  A? Physics program of MINER  A Current Progress. Inverted. Normal.  2.  3.

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MINER  A: Understanding Neutrino-Nucleus Interactions

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  1. MINERA: Understanding Neutrino-Nucleus Interactions Jesse Chvojka University of Rochester June 4th, 2008

  2. Overview • Motivation for studying neutrino interactions in the few GeV region • What is MINERA? • Physics program of MINERA • Current Progress Jesse Chvojka - User's Meeting

  3. Inverted Normal 2 3 1 2 3 1 Why Study Neutrino Interactions? • Is the neutrino mass hierarchy ‘normal’ or ‘inverted’? • Important input for experiments studying whether neutrinos are Dirac or Majorana particles • Is sin2213 non-zero? • Does CP Violation exist in the neutrino sector? Can we ever measure it? One of the biggest systematic uncertainties in experiments aimed at answering these questions comes from neutrino cross-sections Jesse Chvojka - User's Meeting

  4. What is MINERA? • High statistics -nucleus scattering experiment • Will take advantage of the high- flux of NuMI beam • Will sit upstream of the MINOS Near Detector • Finely segmented and fully active detector Jesse Chvojka - User's Meeting

  5. n View of the MINERA Detector Veto Wall Jesse Chvojka - User's Meeting

  6. n View of the MINERA Detector • Nuclear targets (Fe, Pb, C, and He) present to study A-dependence of different processes NuclearTargets: 6.2 tons(40% scint.) Veto Wall Cryotarget LHe 0.25 t Jesse Chvojka - User's Meeting

  7. n View of the MINERA Detector • Nuclear targets (Fe, Pb, C, and He) present to study A-dependence of different processes • Tracking region = inner detector Fully Active Target: 8.3 tons NuclearTargets: 6.2 tons(40% scint.) Veto Wall Cryotarget LHe 0.25 t Jesse Chvojka - User's Meeting

  8. n View of the MINERA Detector • Nuclear targets (Fe, Pb, C, and He) present to study A-dependence of different processes • Tracking region = inner detector • Side and down-stream ECAL and HCAL range out photons, electrons, hadrons Fully Active Target: 8.3 tons NuclearTargets: 6.2 tons(40% scint.) Veto Wall Cryotarget LHe 0.25 t Jesse Chvojka - User's Meeting

  9. n View of the MINERA Detector • Nuclear targets (Fe, Pb, C, and He) present to study A-dependence of different processes • Tracking region = inner detector • Side and down-stream ECAL and HCAL range out photons, electrons, hadrons • MINOS Near Detector will measure the momentum of exiting muons Fully Active Target: 8.3 tons NuclearTargets: 6.2 tons(40% scint.) Veto Wall Cryotarget LHe 0.25 t Jesse Chvojka - User's Meeting

  10. MINERA Event Display Examples Coherent Scattering: (+A+A+0) Quasi-elastic Event: (+n-+p) Coherent Jesse Chvojka - User's Meeting

  11. Main MINERA Physics Topics Will have millions of events on carbon for: • Quasi-elastic: (+n-+p) • Resonance Production: (+N+N*+N’+) (+N+N*+N’+) • Coherent Pion Production: (+A+A+o) (+A-+A++) • Deep Inelastic Scattering (DIS), Structure Funcs., and high-x PDFs • Strange and Charm Particle Production • Nuclear Effects Lipari, Lusignoli and Sartogo, PRL 74, 4384 (1995) SciBoone MINERvA K2K Jesse Chvojka - User's Meeting

  12. Quasi-Elastic (QE) Interactions: Pre-K2K and MiniBoone data QE = +n-+p • One method for measuring -oscillations involves comparing QE interactions in near & far detectors • QE scattering is best known low energy - scattering process K2K & SciBoone Expected MINERA results (statistical errors only) Jesse Chvojka - User's Meeting

  13. Coherent Pion Production Rein-Seghal Paschos- Kartavtsev MINERA’s nuclear targets allow the first measurement of the A-dependence of scoh across a wide A range Jesse Chvojka - User's Meeting

  14. Recent Progress: Vertical Slice Test Vertical Slice Test = Small Mockup of the MINERvA Detector We Found: • 2.5 mm position resolution • 3.4 ns timing resolution • 20 photoelectrons per layer Jesse Chvojka - User's Meeting

  15. Recent Progress – MINERnA Test Beam Detector • Use MTest beam to get 200-800 MeV hadrons • Removable lead and iron absorbers • Studies the response to hadrons in different configurations • Expected start in Fall 2008 Jesse Chvojka - User's Meeting Detector funded by NSF

  16. Recent Progress – Tracking Prototype (TP) • TP = truncated version of MINERA • 10 tracker planes, 10 ECAL planes, 4 HCAL planes • Take cosmic ray data on surface • Test tracking and reconstruction methods • Test construction procedures • If successful, install in beam TP Funded by DOE Jesse Chvojka - User's Meeting

  17. Conclusions • Measuring -A interactions in the few GeV region necessary to get the most out of -oscillation experiments • MINERA well suited to carry out this task • Will be a great assistance to current and future neutrino experiments at Fermilab • MINERA will start taking data in 2009 • Test Beam Detector and Tracking Prototype will run this coming fall/winter Jesse Chvojka - User's Meeting

  18. Backup Slides Jesse Chvojka - User's Meeting

  19. The NuMI Beamline • LE-configuration: • Epeak = 3.0 GeV, <En> = 10.2 GeV • rate = 60 K events/ton - 1020 pot • ME-configuration: • Epeak = 7.0 GeV, <En> = 8.0 GeV, • rate = 230 Kevents/ton - 1020 pot • HE-configuration: • Epeak = 12.0 GeV, <En> = 14.0 GeV, • rate = 525 K events/ton - 1020 pot Jesse Chvojka - User's Meeting Image from: http://www-numi.fnal.gov/talks/postedtalks.html

  20. MINERA Scintillator Strips Strips are 17 x 34 mm • Great position resolution (2.5 mm in VST) • Charge sharing used • Detector Channel Count: • 31,000 channels • 80% in inner hexagon • 20% in Outer detector • 500 M-64 PMTs - 64 channels • 127 pieces of scintillator per Inner Detector plane Jesse Chvojka - User's Meeting

  21. MINERnA and T2K SK sample is mainly non-QE! Jesse Chvojka - User's Meeting Figure courtesy D. Casper

  22. QE Form Factors Jesse Chvojka - User's Meeting

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