Bulletin of the American Physical Society
Joint Fall 2017 Meeting of the Texas Section of the APS, Texas Section of the AAPT, and Zone 13 of the Society of Physics Students
Volume 62, Number 16
Friday–Saturday, October 20–21, 2017; The University of Texas at Dallas, Richardson, Texas
Session B2: High Energy & Particle Physics I |
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Chair: Walter Wilcox, Baylor University Room: DGAC 1.102B |
Friday, October 20, 2017 2:45PM - 2:57PM |
B2.00001: MINER's Sensitivity to Coherent Neutrino Nucleus Scattering in Electron Neutrinos Shiv Akshar Yadavalli Mitchell Institute Neutrino Experiment at Reactor (MINER) is a short-baseline neutrino experiment at the Nuclear Science Center (NSC) at Texas A\&M University. MINER proposes to probe (neutrino physics) coherent elastic neutrino-nucleus scattering (CNS) using ultra-low energy threshold cryogenic germanium detectors. Though CNS is a strong theoretical prediction of the Standard Model (SM), it has only been observed recently due to ultra-low recoil energy deposition in detectors, and never observed $\nu_e$. Taking into account the experimental setup, detector properties, statistical and systematic uncertainties, the viability of the experiment was assessed. The statistical analysis of MINER's sensitivity illustrates that within reasonable experimental constraints, MINER can discover CNS in $\nu_e$ and determine its cross-section within a few months worth of runtime. Deviations of CNS from the standard model would be windows to possible new physics beyond the standard model. The ultra-low threshold detectors in this reactor setup can also be used to probe such processes. So as a follow-up to this analysis, I am looking at MINER's sensitivity to hypothetical $4^{th}$ sterile neutrino oscillations and neutrino decay processes. [Preview Abstract] |
Friday, October 20, 2017 2:57PM - 3:09PM |
B2.00002: Estimating the Impact of W/Z pPb LHC Data on nCTEQ15 PDFs Eric Godat We present the status of the nCTEQ15 global analysis of nuclear parton distribution functions (nPDFs). In this presentation we briefly discuss parton distribution functions, the framework of our analysis and concentrate on the comparison of our results with LHC data. Additionally we show a first estimate of the impact of the LHC pPb W/Z boson production data on the presented nCTEQ15 PDFs. [Preview Abstract] |
Friday, October 20, 2017 3:09PM - 3:21PM |
B2.00003: Non-Standard Interaction of Solar Neutrinos in Dark Matter Detectors Shu Liao Future direct dark matter search experiments can be an ideal probe of information on non-standard interaction (NSI) of solar neutrino through both elastic neutrino-electron scattering and coherent neutrinoj nucleus scattering, and these channels provide complementary probes of NSI. NSI affect neutrino production, propagation, and detection, and have been searched for through each of these channels. For propagation, the presence of NSI modifies the matter potential through both the diagonal and off-diagonal elements in the effective Hamiltonian. For detection, NSI affects the interactions with leptons or quarks, either enhancing or decreasing the cross section relative to the SM value. With dark matter experiments we can identify a range of NSI parameter space that is not ruled out by neutrino experiments. For certain range of NSI parameters the NSI event rate can be reduced by approximately $40\%$ due to the interference between SM and BSM term. In addition to normal LMA solution of neutrino oscillation, "dark side" solution for solar neutrino mixing angle can also be probed by forthcoming dark mattering experiments. [Preview Abstract] |
Friday, October 20, 2017 3:21PM - 3:33PM |
B2.00004: Effects of Engineering Tolerances of Magnetic Field Horns on Neutrino Flux in DUNE Nicholas Lira In the Deep Underground Neutrino Experiment (DUNE) at Fermilab, protons collide with a graphite target to produce pions. These pions are focused by magnetic field horns. Depending on the mode chosen, neutrino or antineutrino, the current in these horns creates a magnetic field that can focus pi plus or pi minus particles. These pions later decay into the neutrinos being studied at the Near and Far Detectors. In the production of the magnetic field horns, engineering uncertainties are expected in the geometries. These uncertainties play a major role in the number of pions that are focused. As a result, engineering tolerances can affect the amount of neutrinos sensed at the detectors. To understand these uncertainty affects on the neutrino flux, the geometry of the Inner Conductor of Horn A was studied. The eccentricity is expected to be +- 25 microns from nominal for this Inner Conductor. Although there is some deviation with the engineering uncertainty, the results from Geant4 show that uncertainties of this size will not affect the neutrino flux by greater than 2%. [Preview Abstract] |
Friday, October 20, 2017 3:33PM - 3:45PM |
B2.00005: Effects of Magnetic Horn Geometry Uncertainty on Neutrino Flux Eric Amador The goal of the Deep Underground Neutrino Experiment (DUNE) at Fermi National Accelerator Laboratory is to precisely measure neutrino and antineutrino oscillation properties, to derive the neutrino mass ordering and to determine if charge-parity (CP) symmetry is violated in the lepton sector. This could provide a possible explanation for the matter-antimatter asymmetry in the universe. In order to maximize the neutrino flux in the desired energy range, the secondary charged mesons produced in the interactions of an intense proton beam with a target are focused using the magnetic field created by a set of horns. Recent optimization efforts of the Long Baseline Neutrino Facility (LBNF) result in a three-horn design. To ensure an accurate understanding of the beam line and the neutrino flux, it is essential to study uncertainties resulting from the geometry of these horns. The effect of eccentricity of the inner conductor of the first focusing horn on the resulting neutrino flux is shown. [Preview Abstract] |
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