1. 1 SciBar for Booster Neutrinos T. Nakaya (Kyoto) March 30, 2005

2. 2 1. Introduction SciBar –Fine-segmented Full-active scintillator tracker FNAL Booster Beamline –Intense Low-energy neutrino beam ➾ A Precision Neutrino Scattering Experiment

3. 3 2. Physics Motivation Neutrino Run (target: 5E19 POT, 3 months ?) –  CCQE Precise flux  measurement for MiniBooNE. If the flux information is available from HARP, it can provide the precise  measurement for T2K. –  CC-coherent  Give a definite conclusion to the forward  deficit in CC interaction. How small is  ( CC-coherent  )? –  CC-resonant  Important mode as background for T2K  disappearance. –  CC-DIS It is important to check the Bodek-Yang collection at low q 2. However, I have no idea how to study it with SciBar data. – e CC Precise measurement for MiniBooNE e search. –  0 d  /dp  0 measurement for MiniBooNE and T2K. If CC-coherent  is suppressed, how small is NC-coherent   ? Is the NC- coherent  consistent with the result by Aachen at 2GeV? Is the relation of CC/NC=2 for coherent  correct? – Single  (  N  ) production [  n(p)  CC:  p,or NC:  n(p) ] The first measurement for an important background mode of T2K MiniBooNE and T2K. Can we reject  0 background to search for the single  production?

4. 4 2. Physics Motivation (continue) Anti-Neutrino Run (target: 10E19 POT, 6 months ?) –  CCQE The first anti-neutrino  measurement. It is important for T2K-II. –  CC-coherent  This is a good check for neutrino  (CC-coherent  ) measurement since the background is smaller in anti-neutrino. –  0 The first(?)  0 data in low energy neutrino. NC-coherent   signal with less background. In SciBar, NC-coherent   measurement may be only possible with anti-neutrino beam because of the large non-coherent   background in neutrino mode.

5. 5 3. What we can provide and what we may request. Provide –Full SciBar detector with electronics. –Man power (~5 FET?) and expertise to install and build the SciBar detector at FNAL. –EM calorimeter ?? I have to ask K2K Italian colleague. –If we are approved, Japan-US research fund for travel expense, shipping and operation. Request –MRD –Help of manpower during installation. We may need 10~20 people/day for 2 months. –High Voltage Power supply for 224 MA-PMTs. We have a very old HV system used for the TRISTAN experiment 20 years ago. I expect that the Lecroy HV system used for KTeV may be available. –Experimental Hall with air-conditioner and crane. With the recent study by Morgan, it looks like that we should locate the detector on-axis to get fruitful physics.

6. 6 4. Possible collaborators from K2K. Kyoto –K. Nishikawa, T. Nakaya, M. Yokoyama, 1 Post- Doc., ~3 students KEK –Y. Hayato, + a few members? Other K2K institute –I never asked this to the K2K collaboration. Possibly, some collaborators may join.

7. 7 5. Schedule (as my guess) 2005200620072008 9-121-45-89-121-45-89-121-45-8 SciBar disassembe Ship to FNAL Installation Commissioning run Anti- run Disassemble Ship to Japan Exp. Hall construction?

8. 8 Limitation –In Japan, we will get the fund in April, 2006 in the earliest case. –I guess that the experimental hall is not ready before summer 2006. –In summer 2008, we start installing a neutrino detector for T2K. T2K starts in April, 2009. 5. Schedule (continue)