PANIC11 - July 25, 2011 1 B.E.Berger/T2K Study of Neutrino Interactions at the T2K Near Detector Complex • The T2K Experiment • T2K Near Detectors • Near Detector Results • Future Interaction in ND280 PØD TPC 1 TPC 2 TPC 3 FGD 1 FGD2 ECAL Bruce Berger for the T2K Collaboration
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Study of Neutrino Interactions at the T2K Near Detector Complex
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PANIC11 - July 25, 2011 1B.E.Berger/T2K
Study of Neutrino Interactionsat the T2K Near Detector Complex
• The T2K Experiment
• T2K Near Detectors
• Near Detector Results
• Future
Interaction in ND280
PØD TPC 1 TPC 2 TPC 3
FGD 1 FGD2 ECAL
Bruce Bergerfor the T2K Collaboration
PANIC11 - July 25, 2011 2B.E.Berger/T2K
The T2K Collaboration
12 Countries:Canada, France, Germany, Italy, Japan, Korea,Poland, Russia, Spain, Switzerland, UK, US
59 Institutions~500 Collabotators
PANIC11 - July 25, 2011 3B.E.Berger/T2K
The T2K Experiment
• 295 km baseline
• ‘Quasimonochromatic’ beam-> first use of the off-axis technique
• Beam peak energy tuned to ~600 MeV, to give L/E at-> first maximum in νµ oscillation probability-> first maximum in νe appearance probability
PANIC11 - July 25, 2011 4B.E.Berger/T2K
T2K Neutrino Beam
• Beam produced at J-PARC• Continual increases in beam intensity
before March 11 earthquake
-> V. Galymov’s poster (#216)“Neutrino Beam Monitoringand Flux Predictionsin the T2K Experiment”
Run 1Run 2
PANIC11 - July 25, 2011 5B.E.Berger/T2K
ND280 - Near Detectors• On-axis and off-axis detectors in a cylindrical ‘pit’ 280 m from thetarget• INGRID - on axis
-> measures beam profile, position,and stability
• ND280 off-axis detectorinside former UA1/NOMAD magnet
-> Both measurements are important inputs to T2K oscillation analyses-> Improvements underway:
• Differential measurements vs. momentum, angle• Complementary PØD analyses
NCπ0 analysis also underway, high priority
Future ND280 cross-section measurements will improve ourunderstanding of neutrino interactions at T2K beam energies
-> JPARC operation will resume in December 2011-> T2K data collection will be resumed soon afterward-> Plenary talk, “J-PARC Status after the Earthquake on March 11”
by K. Tanaka, Wednesday 11:40 am (P3-6)
PANIC11 - July 25, 2011 20B.E.Berger/T2K
Backup Slides
PANIC11 - July 25, 2011 21B.E.Berger/T2K
INGRID14 iron/scintillator modules arranged in a cross