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