Bulletin of the American Physical Society
APS April Meeting 2013
Volume 58, Number 4
Saturday–Tuesday, April 13–16, 2013; Denver, Colorado
Session X9: Neutrino Scattering |
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Sponsoring Units: DNP Chair: Michelle M. Medeiros, Fermilab Room: Governor's Square 11 |
Tuesday, April 16, 2013 10:45AM - 10:57AM |
X9.00001: Results of the $\nu_\mu$ Charged Current Inclusive Analysis using the $\pi^0$ Detector and Time Projection Chamber of the T2K Experiment Raj Das, Alex Clifton, Robert Johnson, Alysia Marino, Erez Reinherz-Aronis, Walter Toki, Tianlu Yuan Using a cut based analysis method, we select charged current interactions of $\nu_\mu$ with nuclei in the Pi-Zero Detector (P0D) of the Tokai to Kamioka (T2K) experiment. We reconstruct negatively charged tracks originating in the P0D and measure their momenta using the Time Projection Chamber (TPC). The results of the analysis are presented as a ratio between selected event rates in data and event rates in monte carlo simulation. The ratios are given as a function of multiple bins of kinematic variables such as candidate muon momentum and track direction at the vertex. We also briefly discuss the strategy behind using the result to extract a neutrino cross section on water. [Preview Abstract] |
Tuesday, April 16, 2013 10:57AM - 11:09AM |
X9.00002: Analysis Strategy and Selection Procedure for $\nu_\mu$ Charged Current Inclusive Interactions using the $\pi^0$ Detector (P0D) and the Time Projection Chambers of the T2K Experiment Erez Reinherz-Aronis, Alex Clifton, Raj Das, Walter Toki, Robert Johnson, Alysia Marino, Tianlu Yuan $\nu_\mu$ Charge-Current events are produced and collected by the Near Detectors (ND280) in the Tokai to Kamioka (T2K) experiment. This talk focuses on those interactions that are created in the Pi-Zero detector (P{\O}D) and whose momentum is measured by the Time Projection Chambers (TPC). The description of the analysis event selection is presented which includes Data-Quality cuts, Beam Quality parameters, and Fiducial Volume boundaries which are applied on the beginning of the P{\O}D track. In addition the matching procedure of a TPC track to a P{\O}D track and the optimization of this procedure in presented. [Preview Abstract] |
Tuesday, April 16, 2013 11:09AM - 11:21AM |
X9.00003: Selection of the Neutrino Induced Charged Current Single Pion Events with the T2K Near Detector Tomasz Wachala, Shamil Assylbekov, Robert Wilson In order to calculate the neutrino induced charged current single pion production on water a two-track event selection in the T2K near detector has been developed. High purity muon tagging was done by requiring its minimum range in the detector and a negative charge. Pion candidate was selected by applying dE/dx based particle identification technique. Event selection has been applied to the simulated data from water-in and water-out detector running modes and preliminary values of 72$\%$ and 77$\%$ of the observable CC1$\pi$ purities were achieved. Preliminary results on the event selection optimization and performance as well as on the systematic errors related to the detector modeling are presented. [Preview Abstract] |
Tuesday, April 16, 2013 11:21AM - 11:33AM |
X9.00004: Preliminary Charged-Current Single Charged Pion Cross Section Measurement on Water with the T2K Near Detector Shamil Assylbekov, Tomasz Wachala, Robert Wilson Using 72\% and 77\% pure observed CC1$\pi^{\pm}$ ND280 Monte Carlo samples obtained after analysis cuts and corresponding to P0D water-in and water-out running modes respectively, a CC1$\pi^{\pm}$ cross section on water measurement was performed. A water-in/water-out event rate subtraction technique was utilized in the process to obtain a CC1$\pi^{\pm}$ event rate exclusively on water. Preliminary results are presented in a form of a flux-averaged cross section with statistical and systematic errors. [Preview Abstract] |
Tuesday, April 16, 2013 11:33AM - 11:45AM |
X9.00005: Charged-current multiple pion production using $\nu_{\mu}$ in the P{\O}D in the T2K experiment Scott Davis The T2K experiment is a long-baseline, off-axis neutrino oscillation experiment designed to search for the appearance of $\nu_{e}$ in a $\nu_{\mu}$ beam. The Pi-Zero Detector (P{\O}D) of the T2K off-axis near detector (ND280) is used to measure properties of the neutrino beam and measure cross sections relevant to the beam's energy. As the P{\O}D contains a variety of nuclei, we can measure the cross section of various production modes on several targets. At the beam energies of T2K, the production of multiple pions, of any type, from neutrinos is not well understood. I will present the status of an analysis method to measure the production of multiple (2 or greater) pions from a charged-current interaction with $\nu_{\mu}$. [Preview Abstract] |
Tuesday, April 16, 2013 11:45AM - 11:57AM |
X9.00006: Minerva Detector Calibration Laza Rakotondravohitra Current and future neutrino oscillation experiments depend on precise knowledge of neutrino-nucleus cross-sections. Minerva is a neutrino scattering experiment at Fermilab. Minerva was designed to make precision measurements of low energy neutrino and antineutrino cross sections on a variety of different materials (plastic scintillator, C, Fe, Pb, He and H2O). In Order to make these measurements, it is crucial that the detector is carefully calibrated.This talk will describe how MINERvA uses muons from upstream neutrino interactions as a calibration source to convert electronics output to absolute energy deposition. [Preview Abstract] |
Tuesday, April 16, 2013 11:57AM - 12:09PM |
X9.00007: MINERvA CCInclusive Analysis David Martinez MINERvA is a few-GeV neutrino scattering experiment that has been taking data in the NuMI beam line at Fermilab since November 2009. The experiment will provide important inputs, both in support of neutrino oscillation searches and as a pure weak probe of the nuclear medium. For this, MINERvA employs a fine-grained detector, with an eight ton active target region composed of plastic scintillator and a suite of nuclear targets composed of helium, carbon, iron, lead and water placed upstream of the active region. In this talk, we present the current status of the charged current inclusive analysis for neutrinos and antineutrinos in plastic scintillator. [Preview Abstract] |
Tuesday, April 16, 2013 12:09PM - 12:21PM |
X9.00008: Inclusive Charged Pion Production at MINERvA Brandon Eberly, Clifford Simon The production of charged pions by neutrinos interacting on heavy nuclei is of great interest in nuclear physics and neutrino oscillation experiments. MINER$\nu$A, a fine-grained scintillator tracking detector that sits in the few-GeV NuMI beamline at Fermilab, is well-suited to study inclusive and exclusive pion production channels on a variety of nuclear targets. This talk presents the current status of the neutrino and antineutrino inclusive charged pion production cross section measurements in MINER$\nu$A. [Preview Abstract] |
Tuesday, April 16, 2013 12:21PM - 12:33PM |
X9.00009: A calculation of the ultra-high energy neutrino cross sections Phuoc Ha Using a very accurate global fit to the combined HERA data for the structure function $F_2^{\gamma p}(x,Q^2)$ extrapolated to the values of Bjorken variable $x$ down to $x=10^{-14}$, we perform a calculation of the ultra-high energy cross sections for neutrino scattering on an isoscalar nucleons at neutrino energies up to $E_\nu$ $\sim$ $10^{17}$ GeV. We also include the contributions from the subdominant NLO structure functions $F_3^{\nu(\bar{\nu})}$ , $F_L^{\nu(\bar{\nu})}$, and $F0_L^{\nu(\bar{\nu})}$ evaluated from $F_2^{\gamma p}(x,Q^2)$ in the calculation. We find that, at the highest energies, our results of the neutrino cross sections do not agree with those calculated using NLO parton distribution functions based on the power-law extrapolations of quark distributions to small $x$. [Preview Abstract] |
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