Bulletin of the American Physical Society
Annual Meeting of the Four Corners Section of the APS
Volume 58, Number 12
Friday–Saturday, October 18–19, 2013; Denver, Colorado
Session D5: Particle Physics II: Experiment |
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Chair: John Cumalat, University of Colorado Room: 251 |
Friday, October 18, 2013 2:00PM - 2:24PM |
D5.00001: Review of Recent Neutrino Oscillation Results Invited Speaker: Walter Toki Neutrino oscillations can be parameterized in terms of four parameters called $\theta_{12}$, $\theta_{23}$, $\theta _{13}$ and $\delta_{\mathrm{CP}}$. Non-zero values of the angles $\theta_{13}$ and $\delta_{\mathrm{CP}}$ could explain the profound mystery of why the observable universe only has matter and little anti-matter. Until recently only weak limits existed on $\theta _{13}$ and nothing was known about $\delta _{\mathrm{CP}}$. But in the last two years there has been a dramatic improvement in our understanding of $\theta_{13}$. This comes from neutrino oscillation results from the long baseline experiment T2K in Tokai, Japan, which observes the neutrino appearance mode $\nu _{\mathrm{\mu }} \to \nu_{\mathrm{e}}$ and from reactor experiments, Daya Bay, Double CHOOZ, and RENO, which measure the neutrino disappearance oscillation mode $\nu_{\mathrm{e}}\to \nu_{\mathrm{e}}$ in reactors operating in China, France, and Korea, respectively. These results now provide compelling evidence that $\theta_{13}$ is about 9 degrees. In this talk, the puzzling neutrino properties and the theory of neutrino oscillation mixing will be briefly introduced. These new experimental results will be reviewed and their impact on neutrino physics will be discussed. [Preview Abstract] |
Friday, October 18, 2013 2:24PM - 2:36PM |
D5.00002: $\nu_\mu$ Charged Current Inclusive Analysis using the Pi-Zero Detector and the Time Projection Chambers of the T2K Experiment Erez Reinherz-Aronis, Alex Clifton, Raj Das, Robert Johnson, Alysia Marino, Walter Toki, Tianlu Yuan $\nu_\mu$ Charge-Current events are produced and collected by the Tokai-to-Kamioka (T2K) Near Detectors (ND280). The talk focuses on the interactions which are created in the Pi-Zero (P{\O}D) detector and their momentum is measured by the Time Projection Chambers (TPCs). The events selection procedure of the analysis is described with its results. These results are presented as a ratio between selected Data events and simulated Monte Carlo events. [Preview Abstract] |
Friday, October 18, 2013 2:36PM - 2:48PM |
D5.00003: Charge Current Anti-Muon Neutrino Events in the Near Detector at T2K Bryan Barnhart The main goal of the near detector at Tokai to Kamioka (T2K) is to constrain the flux of neutrinos present in the neutrino beam produced for the experiment. In addition to this neutrino flux is an anti-neutrino flux which is difficult to measure. To do so requires separating the large positive pion, proton, and wrong sign muon signals from the anti-muons that are generated by interactions in the detector. This talk will focus on the separation of the charged current anti-muon neutrino events from the various backgrounds present in the near detector. [Preview Abstract] |
Friday, October 18, 2013 2:48PM - 3:00PM |
D5.00004: Future Neutrino Oscillation Parameter Sensitivities for T2K and NO$\nu$A Matthew Bass, Daniel Cherdack, Robert Wilson Long-baseline neutrino experiments have the ability to measure the parameters of the mixing matrix that describes neutrino oscillations. Projecting the sensitivity of current and future experiments to these parameters plays a critical role in planning the next generation of experiments. After a brief introduction neutrino oscillations preliminary future sensitivity projections from a combined analysis for the Tokai to Kamioka (T2K) and NuMI Off-Axis Electron-neutrino Appearance (NO$\nu$A) experiments will be discussed with particular emphasis on the methods used and the ability of these experiments to constrain the oscillation parameters, detect Charge-Parity (CP) violation, and determine the neutrino mass hierarchy. [Preview Abstract] |
Friday, October 18, 2013 3:00PM - 3:12PM |
D5.00005: Preliminary Monte-Carlo Studies on Detecting Multi-Nucleon Events in the T2K Pi0 Detector Jaclyn Schwehr The interaction of neutrinos with heavy nuclei is a field of study that has grown rapidly as more experiments are built with heavier targets. Neutrinos interacting with these targets are thought to interact with not just single nucleons, but also with correlated groups of nucleons. Models describing these interactions have been included in neutrino interaction simulation software, giving experimentalists the opportunity to compare these new theories with data. The T2K experiment has included the Nieves et.al. model for multi-nucleon interactions in NEUT (the neutrino interaction simulation program at Super-K) to generate events in the T2K near detector, ND280. This talk will look at initial studies of the feasibility of using the Pi0 Detector in the ND280 detector complex to identify multi-nucleon events using these newly generated simulations. [Preview Abstract] |
Friday, October 18, 2013 3:12PM - 3:24PM |
D5.00006: Vertex Detection Sensitivity Study for Proposed P0D Upgrade Thomas Campbell The T2K experiment is a neutrino oscillation experiment located in Japan contributing to the measurement of various parameters relevant to neutrino oscillations. The Pi0 detector (P0D) is a portion of ND280, the near detector 280 meters from the J-PARC facility. The sensitivity of the Pi0 detector after a proposed upgrade for detecting neutrino events was studied using a particle-gun simulation and certain beam Monte-Carlo files used by the T2K collaboration. [Preview Abstract] |
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