Bulletin of the American Physical Society
2005 APS April Meeting
Saturday–Tuesday, April 16–19, 2005; Tampa, FL
Session M8: Neutrino Physics II |
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Sponsoring Units: DPF DNP Chair: Marc Sher, William and Mary Room: Marriott Tampa Waterside Room 4 |
Sunday, April 17, 2005 3:15PM - 3:39PM |
M8.00001: Studying Neutrinos with FINeSSE Bonnie Fleming Although difficult to produce and detect, neutrinos continue to teach us more and more about nucleon structure, nuclear dynamics, and the Standard Model. Recent results from neutrino oscillation experiments as well as improved neutrino sources have rekindled interest in neutrino scattering physics at relatively low energies (1 GeV). The FINeSSE experiment, taking advantage of these intense neutrino sources, coupled with a precision detector, can cleanly probe the spin structure of the nucleon and measure a suite of low energy neutrino cross sections. [Preview Abstract] |
Sunday, April 17, 2005 3:39PM - 3:51PM |
M8.00002: MiniBooNE Status Richard Van de Water The MiniBooNE experiment at FermiLab is expanding the search for neutrino oscillations in the high mass, low angle parameter region. It will give a definitive answer to the LSND oscillation anomoly, and probe interesting astrophysics motivated oscillation solutions. Given the now accepted positive Solar and Atmospheric oscillation results, a confirmed LSND signal would clearly point to new physics beyond the Standard Model. The MiniBooNE experiment has been taking quality neutrino data from the 8 GeV Booster for over two years. A progress report on the running and data analysis will be given. [Preview Abstract] |
Sunday, April 17, 2005 3:51PM - 4:03PM |
M8.00003: Study of Nuclear Shadowing at MiniBooNE Alessandro Curioni The total cross section for a lepton on a nucleus of atomic mass A is typically less than A times the cross section for a single nucleon; this effect is known as nuclear shadowing (NS). While well established for charged lepton-nucleus interactions, NS is much less well established, both theoretically and experimentally, for neutrino-nucleus interactions in the low energy ($\sim$1 GeV), low transferred momentum regime. We present our program to study NS in this regime using MiniBooNE data, which represent a unique high statistics data sample. [Preview Abstract] |
Sunday, April 17, 2005 4:03PM - 4:15PM |
M8.00004: Very Long Baseline Neutrino Oscillation Experiments at BNL Mark Dierckxsens, Mary Bishai The prospects of a very long baseline neutrino oscillation experiment based at Brookhaven National Lab's Alternating Gradient Synchrotron (AGS) are reviewed. Experimental sensitivity to CP violation effects in the neutrino sector and precision measurements of neutrino mixing matrix parameters from a simulation of a megaton scale underground water Cherenkov detector are presented. [Preview Abstract] |
Sunday, April 17, 2005 4:15PM - 4:27PM |
M8.00005: Constraining MiniBooNE Neutrino Flux Predictions with the HARP Experiment David Schmitz An accurate prediction of the muon neutrino flux and intrinsic electron neutrino background rates is important to the oscillation measurement to be made by MiniBooNE. A good understanding of secondary hadron production from the MiniBooNE target is directly linked to predicting these fluxes. Data were taken in August, 2002, at the Hadron Production Experiment (HARP PS-214) at CERN using an 8.9 GeV/c proton beam and a beryllium MiniBooNE replica target. These data are presently being analysed to measure secondary hadron production cross sections directly from the MiniBooNE target, and will provide MiniBooNE with its best constraints on absolute neutrino fluxes. [Preview Abstract] |
Sunday, April 17, 2005 4:27PM - 4:39PM |
M8.00006: Measuring Active-Sterile Neutrino Oscillations with a Stopped Pion Neutrino Source Richard Van de Water, Gordon McGregor The question of the existence of light sterile neutrinos is of great interest in many areas of particle physics, astrophysics, and cosmology. Furthermore, should the MiniBooNE experiment at Fermilab confirm the LSND oscillation signal, then new measurements are required to identify the mechanism responsible for these oscillations. Possibilities include sterile neutrinos, CP or CPT violation, variable mass neutrinos, and Lorentz violation. In this paper, we consider an experiment at a stopped pion neutrino source to determine if active-sterile neutrino oscillations with $\Delta m^2$ greater than 0.1 $eV^2$ can account for the signal. By exploiting stopped $\pi^+$ decay to produce a monoenergetic $\nu_{\mu}$ source, and measuring the rate of the neutral current reaction $\nu_x \hspace{0.05in} ^{12}C \rightarrow \nu_x \hspace{0.05in} ^{12}C^{*}(15.11)$ as a function of distance from the source, we show that a convincing test for active-sterile neutrino oscillations can be performed. [Preview Abstract] |
Sunday, April 17, 2005 4:39PM - 4:51PM |
M8.00007: Neutrino tests of Lorentz and CPT invariance Matthew Mewes, Alan Kostelecky At low energies, residual effects of Planck-scale physics may manifest as tiny violations of Lorentz and CPT invariance. We discuss the possibility of searching for Lorentz and CPT violation in current and future neutrino-oscillation experiments. We analyze neutrino propagation in the context of the general Lorentz- and CPT-violating Standard-Model Extension. Candidate signals are identified. [Preview Abstract] |
Sunday, April 17, 2005 4:51PM - 5:03PM |
M8.00008: Neutrino Superfluidity Joseph Kapusta It is shown that Dirac-type neutrinos display BCS superfluidity for any nonzero mass. The Cooper pairs are formed by attractive scalar Higgs boson exchange between left- and right-handed neutrinos; in the standard SU(2)xU(1) theory, right-handed neutrinos do not couple to any other boson. The value of the gap, the critical temperature, and the Pippard coherence length are calculated for arbitrary values of the neutrino mass and chemical potential. Although such a superfluid could conceivably exit, detecting it would be a major challenge. [Preview Abstract] |
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