Bulletin of the American Physical Society
2007 APS April Meeting
Volume 52, Number 3
Saturday–Tuesday, April 14–17, 2007; Jacksonville, Florida
Session B10: Neutrino I |
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Sponsoring Units: DPF Chair: Boris Kayser, Fermi National Accelerator Laboratory Room: Hyatt Regency Jacksonville Riverfront City Terrace 6 |
Saturday, April 14, 2007 10:45AM - 10:57AM |
B10.00001: Measurement of Neutrino Induced Exclusive Quasi-Elastic Cross Section in NOMAD Jae Kim The measurement of neutrino induced charged current Quasi-Elastic (QE) cross section using the NOMAD data will be presented. The signature of the $\nu_{\mu}$ QE interaction is an outgoing $\mu^-$ and a proton. I developed a likelihood probability density function to separate QE from background - two track resonance and deep inelastic scattering events. Data themselves were used to help constrain the background estimate. By kinematic comparison to the measured QE data, the axial mass was also measured. This preliminary result is among the most precise measurements of the QE process. [Preview Abstract] |
Saturday, April 14, 2007 10:57AM - 11:09AM |
B10.00002: Measurement of Neutrino Induced Inclusive Delta Resonance Cross section in NOMAD Chris Kullenberg, Jae Kim The measurement of neutrino induced inclusive Resonance interaction process in NOMAD will be discussed. The signature of a $\nu_{\mu}$ induced resonance off a neutron target results in a $\mu^-$ with $\Delta^{++}$~(1230) resonance; the $\Delta^ {++}$ decays into a proton and a pion (two positive hadrons). A likelihood method was used to separate the signal from background (+- hadron pairs). The measurement technique and the preliminary results will be presented. [Preview Abstract] |
Saturday, April 14, 2007 11:09AM - 11:21AM |
B10.00003: The Inclusive Neutrino Charged Current Cross Section Measured in NOMAD Andrew Godley, Qun Wu, Sanjib Mishra The inclusive charged current cross section of muon neutrino interactions is measured as a function of energy using the NOMAD data. The significance of this measurement is its precision below 30~GeV, a region not previously well covered and of importance to current and proposed neutrino experiments. The procedure and results of the measurement will be presented. [Preview Abstract] |
Saturday, April 14, 2007 11:21AM - 11:33AM |
B10.00004: Toward better understanding of MINOS neutrino flux using MIPP hadronic production data Andre Lebedev The Main Injector Particle Production (FNAL E907) experiment is a full-acceptance spectrometer designed to provide particle ID for secondaries with momentum up to 90 GeV/c. The experiment has finished collecting a data set with 20 million events of hadronic interactions of protons, anti-protons, charged pions, and kaons on a number of thin targets from hydrogen to uranium with beam momentum from 5 to 120 GeV/c. In addition, the experiment recorded 1.9 million events of 120 GeV/c protons incident on the target used by NuMI/MINOS for neutrino production. I will discuss the status of data analysis, focusing on how MIPP data can improve understanding of the MINOS neutrino flux. [Preview Abstract] |
Saturday, April 14, 2007 11:33AM - 11:45AM |
B10.00005: MINOS Calibration Jiajie Ling We present the calibration studies and measurements in the MINOS neutrino detector at FNAL. The energy calibration is critical to precisely determine the neutrino oscillation parameters. A key component of the MINOS calibration is a dedicated measurement of the detector response in a test-beam at CERN. Light-injection, cosmic-ray muon, and beam-induced muon provide additional valuable, and in situ, calibration constants and constraints. The calibration study yields an absolute energy measurement at 5{\%} precision; the near-to-far energy difference, critical for THE oscillation MEASUREMENT, is within 2{\%}. [Preview Abstract] |
Saturday, April 14, 2007 11:45AM - 11:57AM |
B10.00006: MINOS Results from the NuMI beam Zarko Pavlovic MINOS is a long-baseline neutrino experiment designed to study the phenomenon of neutrino oscillations. Fermilab's NuMI beamline is used to produce a muon neutrino beam which is pointed toward the two MINOS detectors. The MINOS Near detector is located at Fermilab, 1 km from the target, and the Far detector is 735km downstream in Soudan mine, Minnesota. The NuMI beam is designed to provide a flux of $1.3\times10^{17} \nu/m^2/year$ at the Near detector and $1.7\times10^{11} \nu/m^2/year$ at the Far detector. The measurement is made by observing the disappearance of muon type neutrinos at the Far detector. Based on the first year of data, we have measured $|\Delta m^2_{23}|= 2.74^{+0.44}_{-0.26} \times 10^{-3} eV^2/c^4$ and $sin^2(2\theta_{23}) > 0.87$ (at 60\% C.L.). The sensitivity of the experiment after further data collection will be discussed. [Preview Abstract] |
Saturday, April 14, 2007 11:57AM - 12:09PM |
B10.00007: ABSTRACT HAS BEEN MOVED TO R4.00004 |
Saturday, April 14, 2007 12:09PM - 12:21PM |
B10.00008: Delta Radiative Decays in the MiniBooNE Experiment Laura Gladstone The rare radiative decay of the delta baryon is of particular interest to the MiniBooNE experiment because of its similarity to the $\nu_\mu \rightarrow \nu_e$ oscillation signal. The method of boosting decision trees to form a powerful identifying committee from several weak identifiers is discussed and applied to identifying delta radiative decays. Application of this analysis to the MiniBooNE oscillation data is discussed. [Preview Abstract] |
Saturday, April 14, 2007 12:21PM - 12:33PM |
B10.00009: The Angular Dependence of $\pi^{0}$ Production in the MiniBooNE Antineutrino Data Van Nguyen The single largest background to future $\bar{\nu_{\mu}}\rightarrow \bar{\nu_e}$ oscillation searches is neutral current $\pi^{0}$ production. MiniBooNE, which began taking antineutrino data in January 2006, has the world's largest sample of $\pi^{0}$'s produced by antineutrinos. These neutral pions are primarily produced through the $\Delta$ resonance but can also be created through ``coherent production.'' The latter process is the coherent sum of glancing scatters of antineutrinos off a neutron or proton, in which the nucleus is kept intact but a $\pi^{0}$ is created. A signature of this process is a $\pi^{0}$ which is highly forward-going. It is useful to study coherent production using antineutrinos rather than neutrinos because the ratio of coherent to resonant scattering is enhanced in antineutrino running. This talk will discuss the angular dependence of $\pi^{0}$ production in the MiniBooNE antineutrino data. [Preview Abstract] |
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