Bulletin of the American Physical Society
Annual Meeting of the Four Corners Section of the APS
Volume 55, Number 9
Friday–Saturday, October 15–16, 2010; Ogden, Utah
Session H3: Particle Physics |
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Chair: David Kieda, University of Utah Room: 312 |
Saturday, October 16, 2010 9:00AM - 9:12AM |
H3.00001: Towards Measurement of the Top Quark Cross Section on ATLAS Mario Aletti, Kenneth Johns We present work related to the measurement of the top quark cross section at 7 TeV using the leptons plus jets decay channel at the ATLAS experiment at the CERN LHC. An event selection for top quark pairs is described. Estimates for top quark signal and backgrounds expected with 10 pb-1 of data are given as well as estimates for some of the most important systematic errors. Comparison between data and Monte Carlo expectations are shown. [Preview Abstract] |
Saturday, October 16, 2010 9:12AM - 9:24AM |
H3.00002: An integral equation for distorted wave amplitudes Luca Visinelli, Paolo Gondolo We derive a new integral equation that allows the calculation of the scattering or annihilation amplitude of two particles subjected to two potentials when the corresponding amplitude for one potential only is known. We assume that scattering or annihilation occurs through one of the potentials, while the other potential affects the particle wave functions. Our expression is valid for any choice of the distorting potential and for any particle model. Our technique does not require the expansion of the amplitude into partial waves, and allows the study of models that are generally difficult to solve by means of the Schroedinger equation. [Preview Abstract] |
Saturday, October 16, 2010 9:24AM - 9:36AM |
H3.00003: Estimating Neutrino Oscillation Parameters Sensitivities with GLoBES Matthew Bass In planning the next generation of neutrino oscillation experiments it is critical that the discovery potential for neutrino oscillation parameters be understood. This understanding facilitates the optimization of the design parameters for the experiment, such as detector size, detector type, and the amounts of $\nu$ - $\bar{\nu}$ beam running. General Long Baseline Experiment Simulator (GLoBES) is a software package that allows the simulation of various types of neutrino experimental setups. In this work GLoBES is used to calculate the sensitivity for $sin^2\left(2\theta_{13}\right)$, $\delta_{CP}$, and $sgn\left(\Delta m^{2}_{13}\right)$ for the proposed Long Baseline Neutrino Experiment (LBNE); the times spent running in neutrino and anti-neutrino modes are varied. Both Water Cerenkov and Liquid Argon detector technologies are considered. [Preview Abstract] |
Saturday, October 16, 2010 9:36AM - 9:48AM |
H3.00004: ND280 Detector at T2K Experiment Alex Clifton The T2K experiment will study neutrino oscillations as they travel 295 km from the Japan Proton Accelerator Research Complex (JPARC) in Tokai, Japan, to the Super Kamiokande detector in the Kamioka Mine in Japan. The JPARC accelerator creates a neutrino beam that is monitored by ``NearDetector'' (ND280) that is 280m downstream of the neutrino target where the neutrinos are created. The ND280 detector is measuring the neutrino beam characteristics including its energy spectrum, lepton flavor content, and interaction rates of the unoscillated beam. ND280 is a magnetized detector which houses several sub-detector components. A pi zero detector (P0D) is located in the upstream end of ND280. Inside the P0D are tracking planes of scintillator bars which alternate with lead foil. Downstream from the P0D are three time projection chambers (TPC) and two fine grain detectors (FGD) made of alternating layers of scintillating bars. These are optimized to measure any charged current interactions of the neutrino beam. All of these detectors are housed by an electromagnetic calorimeter (ECAL) which is used to detect gamma rays that do not convert inside the detectors. [Preview Abstract] |
Saturday, October 16, 2010 9:48AM - 10:00AM |
H3.00005: Event Reconstruction in T2K's ND280 Eric Conrad, Fahmida Khanam, Norm Buchanan The T2K (Tokai to Kamiokande) experiment is a long baseline neutrino experiment located in Japan that is measuring the oscillation of a beam of muon neutrinos into electron neutrinos at the Super-Kamiokande (SuperK) detector 395km away. This experiment requires precise knowledge of the beam composition and that the backgrounds to the SuperK signal events be well understood. The PiZero Detector (P0D) is a plastic scintillator-based detector that is a part of the off-axis Near Detector (ND280) which sits 280 meters from the neutrino beam origin. The P0D will be used to measure \(\pi^{0}\) production on a water target because this is the dominant background of the muon neutrino to electron neutrino oscillation signal at SuperK. I will present a description of the event reconstruction for data coming from the P0D including a discussion of the importance of particle identification on measuring the \(\pi^{0}\) production rate. [Preview Abstract] |
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