f AxisOff Axis
Introduction
Off-Axis Cambridge Meeting
12 January 2004
Gary Feldman
Gary Feldman Cambridge Off-Axis 12 January 2004 2
Off Axis Off-Axis Beams
It is clear that the next generation of experiments will concentrate on e oscillations, which areneeded for sin2(213)
sign(m132)
Gary Feldman Cambridge Off-Axis 12 January 2004 3
Off Axis Off-Axis Rationale
Want low-energy narrow-band beams at the oscillation maximum: e appearance maximum
CC disappears Higher-energy NC disappears
Want detectors optimized for e detection Want increases in beam flux times detector mass NuMI Off-axis Experiment
• An order of magnitude increase in sensitivity over MINOS
• Long baseline to maximize matter effects
€
m132 ≈m23
2
Gary Feldman Cambridge Off-Axis 12 January 2004 4
Off Axis Off-Axis Kinematics
€
E =0.43 γmπ
1+γ2 2
Gary Feldman Cambridge Off-Axis 12 January 2004 5
Off Axis
Off-Axis Spectrum(No oscillations)
Gary Feldman Cambridge Off-Axis 12 January 2004 6
Off Axis NuMI Off-Axis Proposal
The Off-Axis experiment is proposed to be 50 kT Medium-Z sandwich detector
• Particle board absorber
• Liquid scintillator strip detectors with APD readout
• Glass RPC detectors fallback option 810 km baseline, about 12 km off-axis (Ash River, MN)
Gary Feldman Cambridge Off-Axis 12 January 2004 7
Off Axis Electron Track
Hits perplane > 1
Gary Feldman Cambridge Off-Axis 12 January 2004 8
Off Axis Muon track
Hits perplane ~1
Gary Feldman Cambridge Off-Axis 12 January 2004 9
Off Axis NC with leading π0
Two tracks withdifferent starting points leading toa “gap”
Gary Feldman Cambridge Off-Axis 12 January 2004 10
Off Axis
Detail ofNC with leading π0
gap
Gary Feldman Cambridge Off-Axis 12 January 2004 11
Off Axis Status
Submitted a LOI to Fermilab PAC August 2002 Submitted a Progress Report December 2003 Will submit a full proposal March 2004 PAC reaction:
“This can potentially become the future flagship experiment in an exciting neutrino physics program at Fermilab.”
“…the Committee feels that some assistance from Fermilab for time-critical R&D needs leading to the proposal are justified.”
Collaboration meeting February 7-8 at Fermilab
Gary Feldman Cambridge Off-Axis 12 January 2004 12
Off Axis Agenda
10:00 Welcome and Introduction Gary Feldman, Harvard10:10 Physics Overview Walter Winter, Munich10:40 Future of Neutrino Program at Fermilab Hugh Montgomery, Fermilab11:00 APS Workshop on Neutrinos Boris Kayser, Fermilab11:15 Coffee Break11:30 NuMI/MINOS Status Sasha Kopp, U. of Texas, Austin11:45 Near term plans for upgrades
All
Eric Prebys, Fermilab12:05
Plans for a Proton Driver
Bob Kephart, Fermilab12:30
Lunch
All14:00
Off-axis Detector with Scintillator
Ken Heller, Minnesota14:20
Off-axis Detector with RPCs
John Cooper, Fermilab14:40
Results of Simulations
Peter Litchfield, Minnesota15:00
Background determination/Near Detector
Stan Wojcicki, Stanford15:20
Site Issues
Marvin Marshak, Minnesota15:40
Coffee Break
All16:00
Long Term NuMI program
Gary Feldman, Harvard16:20
Near Term R&D program
Doug Michael, CalTech16:40
Costs and Schedule
TBC17:00
Discussion
All