Bulletin of the American Physical Society
2006 Division of Nuclear Physics Annual Meeting
Wednesday–Saturday, October 25–28, 2006; Nashville, Tennessee
Session BB: Neutrino Physics I |
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Sponsoring Units: DNP Chair: William Louis, Los Alamos National Laboratory Room: Gaylord Opryland Tennessee A |
Thursday, October 26, 2006 2:00PM - 2:12PM |
BB.00001: Charged-current cross section measurements in MiniBooNE Teppei Katori The MiniBooNE experiment is a short baseline electron neutrino appearance experiment at FNAL. In addition to oscillation physics, the Booster neutrino beam offers excellent neutrino cross section measurements. The charged-current (CC) interaction is the most fundamental process for neutrino physics, and so requires careful investigation. The high statistics data set of MiniBooNE will shed light on this process. We will discuss recent developments in the analysis of the CC interaction, including charged-current quasi-elastic (CCQE) and charged-current pion production (CC1$\pi$). [Preview Abstract] |
Thursday, October 26, 2006 2:12PM - 2:24PM |
BB.00002: A Search for $\nu_\mu \rightarrow \nu_e$ with the MiniBooNE Experiment Rex Tayloe The MiniBooNE experiment, located at Fermilab, is designed to test, with high sensitivity, the LSND result which indicates $\bar{\nu}_\mu \rightarrow \bar{\nu}_e$ oscillations with a probability of 0.264+-0.067+-0.045\%. MiniBooNE searches for $\nu_\mu \rightarrow \nu_e$ oscillations in a high-purity, narrow-band $\nu_\mu$ beam of average energy 800~MeV. The detector is located 550~m from the neutrino source, consists of 800~tons of mineral oil, and records Cerenkov light produced in the signal reaction, $\nu_e n \rightarrow e^- p$. The experiment and analysis methods will be discussed and results from the neutrino oscillation search will be presented. [Preview Abstract] |
Thursday, October 26, 2006 2:24PM - 2:36PM |
BB.00003: A measurement of neutrino nucleon elastic scattering in MiniBooNE D. Christopher Cox Neutrino nucleon elastic scattering $\nu\ N \rightarrow\ \nu\ N$ is a fundamental process of the weak interaction, and provides insight into the structure of the nucleon. In MiniBooNE, a neutrino oscillation experiment at Fermilab, this process comprises about 15\% of all neutrino interactions, making it MiniBooNE's third largest scattering process with over two hundred thousand events expected in the current data sample. A measurement of this process in MiniBooNE will be presented. [Preview Abstract] |
Thursday, October 26, 2006 2:36PM - 2:48PM |
BB.00004: Future Prospects for the Booster Neutrino Beamline at FNAL Chris Polly The Booster neutrino beamline at FNAL was constructed to provide a high-intensity source of neutrinos in the 1 GeV range for the MiniBooNE experiment. Short-term plans for the beamline include the continued operation of the MiniBooNE detector with the beam in antineutrino mode, and the addition of the former K2K SciBar detector in a near location for the SciBooNE experiment. Longer-range possibilities include BooNE, an improved oscillation measurement via the addition of a second large-volume Cerenkov detector; and FINeSSE, a fine-grained detector for measuring cross sections with an emphasis on neutral current interactions. [Preview Abstract] |
Thursday, October 26, 2006 2:48PM - 3:00PM |
BB.00005: Free Proton Charged Current Cross Section using MiniBooNE Anti-Neutrino Data Heather Ray The MiniBooNE experiment completed neutrino running in the fall of 2005 and switched to anti-neutrino running in early January in 2006. The anti-neutrino data sample provides a set of charged current quasi-elastic events which may be used to extract a measurement of the free proton cross section. This talk will focus on the status of the $\overline{\nu_{\mu}}$ CCQE free proton cross section measurement. [Preview Abstract] |
Thursday, October 26, 2006 3:00PM - 3:12PM |
BB.00006: Event Reconstruction and Particle Identification for MiniBooNE Experiment Haijun Yang The MiniBooNE experiment at Fermilab is designed to confirm or refute the evidence for $\nu_\mu \rightarrow \nu_e$ oscillations at $\Delta m^2 \sim 1 eV^2/c^4$ found by the LSND experiment. It is a crucial experiment which may imply new physics beyond the standard model if the LSND signal is confirmed. This talk will focus on the event reconstruction, event identification (or Particle Identification) based on boosted decision trees and expected $\nu_\mu \rightarrow \nu_e$ oscillation sensitivity. [Preview Abstract] |
Thursday, October 26, 2006 3:12PM - 3:24PM |
BB.00007: Results for the Cross Section of the Reaction $^{12}$C(n,n'$\gamma$)$^{12}$C* (4.44 MeV) at E$_n$ = 6.20 and 6.34 MeV using Gamma Ray Detection M.F. Kidd, J.H. Esterline, B. Fallin, A. Hutcheson, A.P. Tonchev, W. Tornow, J.H. Kelley The $\bar{\nu}$ energy spectrum measured by KamLAND is contaminated with background events which are a result of the neutrons from the $^{13}$C($\alpha$,n)$^{16}$O reaction. Because the energy range of these neutrons reaches E$_n$ = 7.3 MeV, the inelastic scattering off $^{12}$C to the 2$^+$ first excited state at 4.44 MeV can occur in the liquid scintillator for E$_n$ exceeding 4.85 MeV. The neutron from the inelastic scattering is indistinguishable from the neutron of interest in the anti-neutrino detection process $\bar{\nu}$ + p $\rightarrow$ e$^+$ + n, and the subsequent $\gamma$ from the deexcitation mimics the positron. Using the Shielded Neutron Source at TUNL with a gamma ray detection setup, we have measured the differential gamma-ray production cross section for this reaction. Clover detectors were placed 62$^{\circ}$, 90$^{\circ}$, and 135$^{\circ}$ from the incident pulsed neutron beam direction at distances of 9.75 cm, 5.7 cm, and 9.2 cm respectively from a 0.75" diameter by 1.0" high graphite cylinder. The differential cross section was measured at neutron energies of 6.20 and 6.34 MeV with an energy spread of 0.14 MeV. [Preview Abstract] |
Thursday, October 26, 2006 3:24PM - 3:36PM |
BB.00008: Differential cross sections for $^{13}$C($\alpha$,n)$^{16}$O reaction Cynthia Wood, Bruno Braizinha, Hugon Karwowski, Mary Kidd, Werner Tornow The reaction $^{13}$C($\alpha$,n)$^{16}$O is the major source of correlated background in the prompt energy spectrum obtained at KamLAND$^{1}$. The source of $\alpha$-particles is the decay of $^{210}$Po. In the $\alpha$-particle energy range from 2.5 and 5.4 MeV there are more than 20 resonances present in the ($\alpha$,n) excitation function. To reduce the uncertainties, a high precision measurement of the differential cross section data for $^{13}$C($\alpha$,n) was made. The $\alpha$-particle beam was produced at the TUNL Tandem accelerator and directed onto self-supporting 100 to 200 $\mu$g/cm$^{2}$ thick $^{13}$C targets. Outgoing neutrons were detected in eight LS detectors placed at lab angles between 23$^{\circ}$ and 150$^{\circ}$ and identified by pulse shape discrimination. The differential cross section data will be presented and normalization techniques will be discussed. [Preview Abstract] |
Thursday, October 26, 2006 3:36PM - 3:48PM |
BB.00009: Multianode Photomultiplier Tube Alignment for the MINERvA Experiment at Fermilab Jorge Bruno The MINERvA experiment (Main INjector \textbf{ExpeRiment} vA) at FNAL will study the neutrino-nucleon and neutrino-nucleus interaction. The light collection from the detector will be done via optic fibers using Hamamatsu H8804 64-channel photomultiplier tubes (PMT). Each PMT channel needs to be precisely aligned with the corresponding optic fiber. The MINERvA PMT optical boxes contain precision machined optic ``cookies'' which capture the 8x8 array of optic fibers. Each PMT-cookie pair needs to be aligned as precisely as possible. This contribution will describe the alignment setup and procedure implemented at James Madison University. [Preview Abstract] |
Thursday, October 26, 2006 3:48PM - 4:00PM |
BB.00010: A Global three-parameter model for neutrino oscillations using Lorentz violation Teppei Katori, Alan Kostelecky, Rex Tayloe The neutrino oscillation experiment is a natural interferometer. It is sensitive to small spacetime properties without using the photon (QED) but the sensitivity is comparable with precision optical measurements ($<10^{-19}GeV$). So neutrino oscillations may be seeing small spacetime effects, such as Lorentz violation. Lorentz and CPT violation are predicted phenomena from Planck scale physics and are actively studied, mainly under the Standard-Model Extension (SME) formalism, the Standard Model with Particle Lorentz Violation. We have developed a model of neutrino oscillations that has only three degrees of freedom and is consistent with existing data under the renormalizable sector of SME, and it offers an alternative to the standard 3-neutrino massive model. All classes of neutrino data are described, including solar, reactor, atmospheric, and LSND oscillations. The disappearance of solar neutrinos is obtained without matter-enhanced oscillations (MSW effect). Quantitative predictions are offered for the ongoing MiniBooNE experiment and for the future experiments OscSNS, NOvA, and T2K. [Preview Abstract] |
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