Bulletin of the American Physical Society
2008 Annual Meeting of the Division of Nuclear Physics
Volume 53, Number 12
Thursday–Sunday, October 23–26, 2008; Oakland, California
Session FC: Mini-Symposium: Neutrino Properties and Nuclear Physics III |
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Chair: Robert McKeown, California Institute of Technology Room: Jewett Ballroom A-B |
Saturday, October 25, 2008 8:30AM - 9:06AM |
FC.00001: New Neutrino Oscillation Results from MiniBooNE Invited Speaker: The first MiniBooNE neutrino oscillation results published April of 2007 ruled out the simple two neutrino oscillation hypothesis of the LSND experiment. However, MiniBooNE unexpectedly observes a significant excess of electon-like events below a reconstructed neutrino energy of 475 MeV. An updated analysis of this low energy region will be presented. [Preview Abstract] |
Saturday, October 25, 2008 9:06AM - 9:18AM |
FC.00002: Neutrino Interactions with Nuclei Ulrich Mosel, Tina Leitner We investigate interactions of neutrinos with nuclei at intermediate energies, incorporating quasielastic scattering and the excitation of nucleon resonances and their decay as elementary processes. The calculations take into account medium effects such as Fermi motion, Pauli blocking, mean-field potentials and in-medium spectral functions. A coupled-channel treatment of final state interactions is achieved with the GiBUU transport model. The results of these calculations are tested against electroproduction experiments, both inclusive and exclusive. Results for neutrino-induced inclusive cross sections, as well as for pion production and nucleon knockout, are presented and compared with present day experiments. [Preview Abstract] |
Saturday, October 25, 2008 9:18AM - 9:30AM |
FC.00003: Charged current single pion to quasi-elastic cross section ratio Steven Linden Charged current pi+ (CCPi+) interactions are important in many neutrino experiments, including those studying neutrino oscillations, but the cross section for this process is not well understood at low energies. We present a new measurement of the CCPi+ cross section as a ratio to the charged current quasi-elastic cross section for muon neutrinos on mineral oil in the MiniBooNE experiment. With more than 46,000 CCPi+ events collected in MiniBooNE, this measurement represents a dramatic improvement in statistics and precision over previous results at low energies. [Preview Abstract] |
Saturday, October 25, 2008 9:30AM - 9:42AM |
FC.00004: Neutrino quasi-elastic scattering measured with MINERvA Ronald Ransome The MINERvA experiment is a high precision neutrino scattering experiment designed to improve our understanding of the neutrino-nucleus interaction. The detector will use a fully active scintillation detector to allow full event reconstruction, as well as 4He, and thin C, Fe, and Pb targets to study the nuclear dependence of the interaction. The experiment is planned to start a four year run in 2010 in the NuMI Beamline at Fermilab. The axial form factor can be extracted from quasi-elastic scattering from the different nuclear targets. A discussion of the estimated precision and systematic uncertainties will be presented. [Preview Abstract] |
Saturday, October 25, 2008 9:42AM - 9:54AM |
FC.00005: Unexpected Nuclear Effects in $\nu $-Fe Interactions and MINERvA's Program to Measure Neutrino Scattering off a Range of Nuclei Jorge G. Morfin Recent studies of nuclear effects in $\nu $ -Fe data by members of the CTEQ collaboration suggest that nuclear effects as seen by neutrinos are very different compared to those from $\mu $/e-Fe scattering. The MINERvA experiment will measure $\nu $ -A scattering off of He, C, Fe and Pb to systematically study these nuclear effects in neutrino interactions with high statistics. The CTEQ results and an outline the MINERvA program for measuring nuclear effects will be presented. [Preview Abstract] |
Saturday, October 25, 2008 9:54AM - 10:06AM |
FC.00006: On the electroweak physics reach of the NuSOnG experiment James Jenkins I present on the electroweak physics potential of the proposed NuSOnG (Neutrino Scattering On Glass) experiment at Fermilab. NuSOnG's design and projected interaction rates suggest a unique physics program that can indirectly probe energy scales in excess of 5 TeV, comparable to that of the LHC! However, due to their weak current nature, neutrino scattering yields information complementary to conventional colliders in physics content. After introducing the general motivation for neutrino scattering at NuSOnG I move on to describe precision, multi-channel, measurements of Standard Model parameters. Next, I survey both direct and indirect searches for new physics via nonstandard neutrino couplings and potential Z prime interactions. This is supplemented throughout by a discussion of example models that may be constrained by this experiment. [Preview Abstract] |
Saturday, October 25, 2008 10:06AM - 10:18AM |
FC.00007: First Measurement of Neutrino Events in an Off-Axis Horn-Focused Neutrino Beam Zelimir Djurcic The purpose of the MiniBooNE experiment at Fermilab is to perform a $\nu_{\mu}\rightarrow\nu_{e}$ oscillation search in the Booster Neutrino Beam (BNB) beamline. However, the MiniBooNE Experiment reports the first observation of off-axis neutrinos from the NuMI beamline at Fermilab. Measurements of NuMI neutrino interactions in MiniBooNE provide a clear proof-of-principle of the off-axis beam concept that is being planned for use in future neutrino experiments such as T2K and NO$\nu$A. The comparison between data and simulation for both charged current quasi-elastic $\nu_{\mu}$ and $\nu_{e}$ events provides a direct check of the expected pion and kaon contributions and validates the modeling of the NuMI off-axis beam. The beam energy at the MiniBooNE location and the distance from the NuMI target to the MiniBooNE detector result in a ($L/E_{\nu}$)-ratio comparable to the BNB. The NuMI off-axis events are dominated by intrinsic $\nu_{e}$ events and therefore subject to different systematics when compared to the BNB neutrinos. Therefore, the data from the NuMI beamline provide an important complementary sample to pursue an oscillation search. The latest analysis results will be presented. [Preview Abstract] |
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