Bulletin of the American Physical Society
Joint Fall 2021 Meeting of the Texas Sections of APS, AAPT, and SPS
Volume 66, Number 10
Thursday–Saturday, October 21–23, 2021; Houston; Central Time
Session T01: Nuclear & Particle III |
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Chair: Serkan Caliskan, UHCL Room: STEM 2101 |
Saturday, October 23, 2021 10:00AM - 10:12AM |
T01.00001: Determining Neutron Scattering Cross Sections of $^{12}$C Elizabeth Chouinard At the University of Kentucky Accelerator Lab (UKAL), experiments were done to determine neutron elastic and inelastic scattering differential cross sections for $^{12}$C. The results of these measurements not only enhance our knowledge of how neutrons interact with a $^{12}$C nucleus but also provide valuable information for the next generation of nuclear reactors, i.e., Gen IV reactors. Carbon and carbon materials serve as constituents in several of the Gen IV reactor designs as fuel coatings, moderators, control rods, etc. In the experiments at UKAL, a 7 MV model CN Van de Graaff accelerator was used to generate a pulsed proton beam which then interacted with tritium or deuterium to produce nearly monoenergetic neutrons through the $^3$H(p,n)$^3$He or the $^2$H(d,n)$^3$He reactions. Using time-of-flight techniques, these neutrons scattered off a carbon sample and were detected with an EJ310 liquid scintillator detector and a C$_6$D$_6$ liquid scintillator detector. Angular distributions of 0.29, 0.51, 7.25, and 7.75 MeV scattered neutrons were deduced from the measurements. Results from these measurements, along with comparisons to theoretical data evaluations from the National Nuclear Data Center (NNDC) will be presented. [Preview Abstract] |
Saturday, October 23, 2021 10:12AM - 10:24AM |
T01.00002: Search for electroweak production of supersymmetric particles in final states containing hadronic decays of WW, WZ, or WH and missing transverse momentum Ankush Reddy Kanuganti Results are presented from a search for chargino-neutralino or chargino pair production via electroweak interactions. The results are based on a sample of $\sqrt{s}=13TeV$ proton-proton collisions from the LHC, recorded with the CMS detector and corresponding to an integrated luminosity of 137 $fb^{-1}$. The search considers final states with large missing transverse momentum and pairs of hadronically decaying bosons WW, WZ, and WH, which are identified using novel algorithms. No significant excess of events is observed relative to the expectation from the standard model. Limits at the 95\% confidence level are placed on the cross-section for production of mass-degenerate wino-like superpartners of SU(2) gauge bosons, $\widetilde{\chi}^{\pm}_{1}$/$\widetilde{\chi}^{0}_{2}$. In the limit of nearly-massless neutralinos $\widetilde{\chi}^{0}_{1}$, $\widetilde{\chi}^{\pm}_{1}$/$\widetilde{\chi}^{0}_{2}$ with masses up to 870 and 960 GeV are excluded in the cases of $\widetilde{\chi}^{0}_{2}$$\rightarrow$Z$\widetilde{\chi}^{0}_{1}$ and $\widetilde{\chi}^{0}_{2}$$\rightarrow$H$\widetilde{\chi}^{0}_{1}$, respectively. Interpretations for other models are also presented. [Preview Abstract] |
Saturday, October 23, 2021 10:24AM - 10:36AM |
T01.00003: Longitudinal Fluctuations in Heavy Ion Collisions with the ALICE Detector Raquel Quishpe Anisotropic flow in relativistic heavy-ion collisions has been studied as a signature of the quark gluon plasma (QGP). For different colliding systems, anisotropic flow has been described by the decomposition of azimuthal correlations into Fourier coefficients. Furthermore, it has been observed that longitudinal correlations also show anisotropies in the medium, which may give further constrains to the QGP and the initial state. These longitudinal correlations can be analyzed and described by orthogonal polynomials, such as Legendre Polynomials. Results from longitudinal correlations coefficients, $a_{n}$, are presented for Xe-Xe ($\sqrt{s_{NN}}$ = 5.44 TeV) and Pb-Pb ($\sqrt{s_{NN}}$ = 5 TeV) collisions at the LHC. [Preview Abstract] |
Saturday, October 23, 2021 10:36AM - 10:48AM |
T01.00004: Proto-DUNE High Voltage Feed-Through Electric Field Simulation with COMSOL Michael Solek, Jaehoon Yu, Wooyoung Jang, Ahmed Bedair, Steven Boucher, Eric Garcia, Gajendra Gurung, Aayush Bhattarai, Harshwardhan Prasad, Skyler Ryu The Deep Underground Neutrino Experiment (DUNE) will require the construction of four liquid argon time projection chambers (LArTPC) approximately 13,000 cubic meters in volume to act as neutrino detectors. These detectors will depend on a powerful, uniform electric field, which will require a power supply capable of delivering 300,000 V. To help ensure smooth, predictable operation of the final detectors, a prototype detector, Proto-DUNE, is being constructed. As part of prototyping a high voltage feed-through for Proto-DUNE, it has been modeled in COMSOL to simulate the electric field it generates to foresee and prevent failures like electrical arcing. [Preview Abstract] |
Saturday, October 23, 2021 10:48AM - 11:00AM |
T01.00005: Study of Neutrino Production Rate Dependence on the Target Dimension for Low-Mass Dark Matter Searches in Future Neutrino Experiments Aayush Bhattarai, Wooyoung Jang, Jaehoon Yu Dark matter is perceived to make up about 85 percent of the mass in the entire universe. It is a compelling observational motivation in the search for new physics since the Standard Model of Particle Physics cannot explain its existence. Future neutrino experiments, such as the Deep Underground Neutrino Experiment (DUNE), use high-intensity proton beams impinging on a fixed target. The unprecedented intensity of the proton beams enables us to look for low-mass dark matter (LDM) and other particles produced in the proton interactions with the target. With the possibility of charge neutral LDM being produced in the target, a large number of neutrinos will be generated alongside which will be the primary background to the LDM signal. To understand the neutrino production rate dependence to target lateral volume, we simulated the proton interactions in DUNE neutrino target using GEANT4 for 1000 protons on target with different radii: 1cm, 2cm, 4cm, 10cm, 20cm, and 40cm. This presentation will provide the results of data analysis of neutrinos production, energy, and angular distribution for different target radii. We also compared the data for the different species of neutrinos to understand their dependence on the target volume. [Preview Abstract] |
Saturday, October 23, 2021 11:00AM - 11:12AM |
T01.00006: Identification of Charm-Quark-Initiated Jets Using Displaced Track Counting with the ATHENA Experiment at the Electron-Ion Collider Stephen Sekula The Electron-Ion Collider (EIC) recently passed through the CD-1 project approval process and continues toward construction and operation at the Brookhaven National Accelerator Laboratory. The ATHENA (A Totally Hermetic Electron-Nucleus Apparatus) proto-experiment is under development as one of the possible experimental programs at the EIC. I will present work done in the context of ATHENA using tracks displaced from the interaction point as a means to identify charm-quark-initiated jets. These jets can be produced when the beam lepton interacts with a strange quark in a proton, neutron, or nucleus. I will show preliminary results on charm jet tagging using this approach and provide an outlook for this and other approaches at the EIC. [Preview Abstract] |
Saturday, October 23, 2021 11:12AM - 11:24AM |
T01.00007: Kaons Identification of Charm-Quark-Initiated Jets Using the Proposed ATHENA Detector at the Electron-Ion Collider Stephanie Gilchrist The electron-ion collider (EIC) is a proposed particle collider at Brookhaven National Laboratory that will provide new opportunities for precision studies of protons, neutrons, and nuclei. At least one experiment will operate at the EIC. One proposal under development is the ATHENA proto-experiment (A Totally Hermetic Electron-Nucleus Apparatus). We are interested in using the EIC and ATHENA to study the strange quark content of the proton. I will discuss the work I have done to identify charm quark jets, induced from strange quarks. The work focuses on using single kaons to identify jets. Simulation results I obtained will be shown in the context of the baseline model for the ATHENA detector. [Preview Abstract] |
Saturday, October 23, 2021 11:24AM - 11:36AM |
T01.00008: Pentaquark Search in the Strange Sector at ALICE at the LHC Jacobb Martinez The recent discovery of the hidden charm pentaquarks $P_{c}(4312)^{+}, P_{c}(4440)^{+},$ and $P_{c}(4457)^{+}$ by LHCb has reopened the question of whether pentaquarks exist in the strange sector. The strangeness enhancement, measured by ALICE as a function of increasing charged particle multiplicity even in $\textit{pp}$ collisions, further adds to the likelihood of observing a strange pentaquark state. Following analogous decay channels for the $P_{c}^{+}$ states into the strange sector, results for ${P_{s}}\rightarrow\phi\rm{\textit{p}}$, ${P_{s}}\rightarrow\Lambda{K}$, ${P_{s}}\rightarrow\Lambda{K}^{*}$, and ${P_{s}}\rightarrow\Sigma^{*}{K}$ through the invariant mass analysis in $\textit{pp}$ collisions at $\sqrt{s} = 13$ TeV are presented. Upper limits to the yields of ${P_{s}}$ states are determined. [Preview Abstract] |
Saturday, October 23, 2021 11:36AM - 11:48AM |
T01.00009: Lattice Quantum Chromo Dynamics - From Gauge Generation to Correlation Function Construction Matthew Teel, Samina Masood We go from the perturbative regime involving the path integral approach of Quantum Chromo Dynamics (QCD), to the non-perturbative regime in an attempt to extract more detail in the low momentum transfer domain where the path integral formalism breaks down. We will discuss overarching strategies that can be described as carrying out QCD calculations by representing possible positions and interactions of quarks and gluons as points on an imaginary 4D space-time lattice. We begin with gauge generation to set up for propagator computation, to then conclude with correlation function construction, which generally uses the outputs of the propagator stage to generate correlation functions that then become subject to statistical analysis. [Preview Abstract] |
Saturday, October 23, 2021 11:48AM - 12:00PM |
T01.00010: The Deep Underground Neutrino Experiment Design and Associated Quality Control Procedure Harshwardhan Prasad The Deep Underground Neutrino Experiment aims to explain the phenomenon's unexplained by the Standard Model. DUNE consists of a Far Detector situated approximately a kilometer beneath the Sanford Underground Research Facility (SURF) in South Dakota and a Near Detector situated at Fermilab. The design of the DUNE consists of a Liquid Argon Time Projection Chamber (LArTPC), the purpose of which is to detect neutrino interactions and reconstruct particle tracks. The Far Detectors consist of a field cage, high voltage system, photon detection system, and more. The field cage, made up of fiber reinforced plastic (FRP) I-beams, provides the structure for the detector and houses the necessary electrical components that creates the electric field. The successful operation of the field cage depends on the components used due to the sensitivity of the experiment, and hence it is important to have high standard for passing the parts. The UTA HEP team has devised a quality assurance and quality control procedure to process the I-Beams and similar FRP components to be used in the construction of modules that are integral to the detection of neutrinos. [Preview Abstract] |
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