2002/10/31 by M. Diwan, BNL Neutrino Working Group, Diwan, M.
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ex/0211001
Report of the Brookhaven Neutrino Working Group to BNL. 100 pages. See http://nwg.phy.bnl.gov/ for more information
arxiv created 2002/10/31 · arxiv updated 2009/11/30
The possibility of making a low cost, very intense (1MW) high energy proton source at the Brookhaven Alternating Gradient Synchrotron (BNL-AGS) along with the forthcoming new large underground detectors (approaching 1 MT in mass) at the National Underground Science and Engineering Laboratory (NUSEL) in Homestake, South Dakota or at the Waste Isolation Pilot Plant (WIPP) in Carlsbad, New Mexico, allows us to propose a program of experiments that will address fundamental aspects of neutrino oscillations and CP-invariance violation. This program is unique because of the very long baseline of more than 2500 km from BNL to the underground laboratory in the West. We used the running scenario of a low energy, wide band neutrino beam with 1 MW AGS, 500 kT of fiducial mass water Cherenkov detector, and 5x107 seconds of running time. In this report we show that with these conditions we precisely measure dm232 and sin2(2theta23) and have excellent sensitivity to sin2(2theta13) with a distinctive signal spectrum. If sin2(2theta13) > 0.01 the experiment is sensitive to the CP-violating phase in the mixing matrix with only neutrino running. By running in the anti-neutrino mode we distinguish between the cases dm231 > 0 versus dm231 < 0 using distinctive distortions to the electron or positron spectrum. Lastly, the very long baseline allows the measurement of dm221 (in the LMA region) with approximately the same resolution as KAMLAND but in the numu -> nue appearance channel.