Bulletin of the American Physical Society
2008 APS April Meeting and HEDP/HEDLA Meeting
Volume 53, Number 5
Friday–Tuesday, April 11–15, 2008; St. Louis, Missouri
Session R13: Neutrinos II |
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Sponsoring Units: DNP Chair: William Louis, Los Alamos National Laboratory Room: Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), St. Louis F |
Monday, April 14, 2008 10:45AM - 10:57AM |
R13.00001: ABSTRACT WITHDRAWN |
Monday, April 14, 2008 10:57AM - 11:09AM |
R13.00002: Status of Dimuon Analysis in the MINOS Near Detector Azizur Rahaman, Jiajie Ling, Sanjib Mishra We present the status of neutrino induced dimuon events in the MINOS Near Detector (ND). The ND has 3.2M identified $\nu_\mu$-CC events with an identified single negative muon with an average neutrino enerrgy ($E_\nu$) of 10.5 GeV. The dimuon analysis focuses on the neutrino charm-production where the charmed hadron decays into a positive-muon. Estimates of signal (charm) efficiency and background, and sensitivity to physics parameters such as strage quark distribution and the mass parameter of the charm quark will be presented. [Preview Abstract] |
Monday, April 14, 2008 11:09AM - 11:21AM |
R13.00003: NuMI Beam Flux Inferred from fitting ND Data Robert Armstrong A knowledge of the production of secondary hadrons off the NuMI target is needed to accurately predict the neutrino flux in the MINOS experiment. A method for tuning the underlying production spectra of secondary hadrons to match the MINOS near detector data will be described. The NuMI beam has the advantage of tuning the typical beam energy by changing the target configuration. Hadron production and the NuMI beam flux are constrained by a fit to data taken in multiple beam configurations. Preliminary results will be shown. [Preview Abstract] |
Monday, April 14, 2008 11:21AM - 11:33AM |
R13.00004: Electron Neutrino Identification in the MINOS Detectors Tingjun Yang The MINOS experiment has the potential to further constrain or make the first measurement of the neutrino mixing angle $\theta_{13}$. It is very important to understand the electromagnetic and hadronic showers in the MINOS detectors. Several discriminating methods and techniques are developed to separate the $\nu_{e}$ signals from a huge amount of backgrounds. The details of these techniques are discussed. [Preview Abstract] |
Monday, April 14, 2008 11:33AM - 11:45AM |
R13.00005: Measurement of Hadron Production for the FNAL Neutrino Program Jonathan Paley Measurements of neutrino cross-section and oscillations depend heavily on neutrino flux predictions. Such predictions rely on hadron-nucleus interaction cross-section data, and yet the data are scarce. The E907 Main Injector Particle Production (MIPP) experiment at Fermilab is a full acceptance spectrometer with excellent particle identification capabilities. MIPP has collected $\sim 15 \times 10^6$ events of p's, $\pi$'s and K's at various momenta (from 5 to 120 GeV) on several targets spanning the periodic table, from hydrogen to uranium including beryllium and carbon. In particular, MIPP has collected hadron production data on a spare NuMI target using 120 GeV/$c$ protons from the Main Injector. We review the experiment, performance of the spectrometer and show preliminary results of particle production ratios of $\pi^-/\pi^+$, K$^+$/$\pi^+$, K$^-$/$\pi^-$, and K$^-$/K$^+$ in bins of longitudinal and transverse momentum for thin and thick carbon targets. [Preview Abstract] |
Monday, April 14, 2008 11:45AM - 11:57AM |
R13.00006: Characterizing Backgrounds in the NuMI Muon Monitors Jesse Chvojka The NuMI beam is a high intensity muon neutrino beam used for neutrino oscillation and neutrino cross section experiments, both of which require a well-known flux. The accompanying muon from pions and kaons decaying to a muon and muon neutrino can be used to estimate the muon neutrino flux. Muons are measured with three helium ion chambers (``muon monitors'') in alcoves upstream of the MINOS near detector. Delta rays scattered off from rock and neutrons originating in the beam hadron absorber are a significant background within the monitors. We use GEANT4 to simulate the muon monitors and the effect of delta rays on measurements taken with the monitors. We also simulate the effect of inserting absorbers in front of the monitors to compare to future tests which would allow us to validate this Monte Carlo. [Preview Abstract] |
Monday, April 14, 2008 11:57AM - 12:09PM |
R13.00007: NuSOnG: A new high-precision neutrino scattering experiment at the TeVatron Georgia Karagiorgi A new high-energy, ultra-high statistics neutrino experiment, NuSOnG (Neutrino Scattering On Glass), has been proposed to study neutrino scattering at high energies with extremely high precision. I present the conceptual design of the experiment, and discuss some of its unique discovery potential for direct searches for new physics at the Terascale. These searches include searches for new light neutrino properties, new interactions manifested through rare events, and new particles such as light neutrissimos, light vector bosons, etc. which appear in models for Beyond the Standard Model physics. A particular example which highlights the discovery potential of NuSOnG, is the search for evidence of ``matrix freedom'' or non-unitarity in the neutrino sector. Non-unitarity can manifest itself in a number of ways, such as through flavor-dependent neutrino couplings, or instantaneous flavor transitions, both of which would cause observable effects at NuSOnG. [Preview Abstract] |
Monday, April 14, 2008 12:09PM - 12:21PM |
R13.00008: 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] |
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