Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session LE: Undergraduate Research I |
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Chair: Fatiha Benmokhtar, Duquesne University Room: Park & Scollay |
Wednesday, October 13, 2021 2:00PM - 2:12PM |
LE.00001: Analysis of the cos(2φ) modulation in semi-inclusive deep-inelastic scattering Benjamin Gordon, Andreas Metz, Daniel Pitonyak, Alexei Prokudin, Adam J Rilatt, Tristan Rosenberry
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Wednesday, October 13, 2021 2:12PM - 2:24PM |
LE.00002: Particle Identification with the Jefferson Lab CLAS12 Ring Imagning Cherenkov Detector Aiden Boyer, Fatiha Benmokhtar, Valery Kubarovsky A Ring Imaging CHerenkov (RICH) detector was built for Hall B at Jefferson lab as an addition to its base equipment for pion, proton and kaon separation in the 3 to 8 GeV/c momentum range. A second RICH detector is under construction. In this talk I will present the principal of Cerenkov detection, this RICH detector and its component and will focus on my work on the diagnosis of the multi-anode photomultpliers that are used as a screen detector for Cherenvov photons. I will also present my work on the software development for timing calibrations and online monitoring. |
Wednesday, October 13, 2021 2:24PM - 2:36PM |
LE.00003: Abstract Withdrawn
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Wednesday, October 13, 2021 2:36PM - 2:48PM |
LE.00004: Relativistic Kinematics for the EIC and simulations of the far Forward region of the detector Asia Parker, Fatiha Benmokhtar, Douglas W Higinbotham The future electron ion collider aims to answer fundamental questions about the internal structue of the nucleon. In this talk I will be presenting my kinematical study and visualizations of the electron-ion collisions as well as my work on simulating the far forward regions for both IP6 and IP8. These two interaction regions of the EIC have different cross angles and different optics in the far forward regions. |
Wednesday, October 13, 2021 2:48PM - 3:00PM |
LE.00005: Developing electron ID algorithms for a new forward electron magnetic calorimeter at the Electron Ion Collider Keaghan Knight, Renee H Fatemi The Electron Ion Collider (EIC) is a new nuclear physics facility that will provide collisions of high energy electron and ion beams, with the goal of studying strong interactions at an unprecedented precision. The detection and identification of the scattered electron allows for the reconstruction of the kinematics of the interaction and is essential for the vast majority of the proposed measurements. The EIC Collider Experiment (ECCE) Consortium is in the process of designing a high resolution forward electron endcap calorimeter. This presentation will discuss the proposed detector performance and the efficacy of the various electron identification algorithms, as evaluated in the ECCE GEANT based simulation packages. |
Wednesday, October 13, 2021 3:00PM - 3:12PM |
LE.00006: Studies revealing the structure of light mesons at the Electron-Ion Collider Alex D Zarta Atoms are the building blocks of everything and are made up of smaller things such as protons, neutrons, and electrons. There are even smaller particles that makeup neutrons and protons, the quarks and gluons. Most of the visible mass comes from the quark and gluon interactions. In my research, I am focusing on the structure of mesons, particles that are made from one quark and an anti-quark fixed with a gluon. I've been developing Monte Carlo simulations to make projections for meson structure experiments at the Electron-Ion Collider (EIC). I've been utilizing python, C++, and Geant4 to build a Monte Carlo and root to visualize and analyze the projected data. The EIC requires instrumentation, specifically the detection of the scattered electron. I am focusing on investigating the optimal configuration of an EM calorimeter that detects scattered electrons. I've been working with a simulation that resembles the geometry and materials. This enables us to study the energy deposition in the scintillation material, the energy resolution of detector assembly, and the ratio of Cherenkov to scintillation optical photons. In this talk, I will present projections of meson structure-function measurements at the EIC and optimized detector configurations required to collect data. |
Wednesday, October 13, 2021 3:12PM - 3:24PM |
LE.00007: Studies of Proton Structure from Photo- and Electro-Production of Light Vector Mesons Marie Boer, Kevin Sanford The analysis of light vector meson production by a high-energy electron or photon beam in a particle accelerator provides insight into the composition of the proton, further expanding the fundamental understanding of physics. The electro-production of light vector mesons off of protons happens when a high virtuality photon interacts with a quark, which can be studied to extract the Generalized Parton Distributions (GPDs). These functions provide access to the correlation between the longitudinal momenta of partons and their transverse position. They can be further interpreted to obtain multidimensional images of the proton. Vector mesons are particularly sensitive to the GPDs H and E and allow for flavor decomposition of the proton's GPDs. We implemented various vector mesons in a generator used in simulations for Jefferson Laboratory (DEEPGen) and for EIC (DEEPSim). Our goal is to contribute to the development of future Hard Exclusive (light) Vector Meson experiments for Jefferson Laboratory and EIC. We will discuss the physical interest of measuring light vector mesons for accessing GPDs, then present our work with the event generator and our projections for future experiments. |
Wednesday, October 13, 2021 3:24PM - 3:36PM |
LE.00008: Three Dimensional Imaging in Nuclei. Mishary Alrashed, Daniele Paolo Anderle, Zhongbo Kang, John D Terry, Hongxi Xing We perform the first simultaneous global QCD extraction of the transverse momentum dependent (TMD) Parton Distribution Functions in nuclei and the nuclear modified TMD Fragmentation Functions, which encode the three-dimensional information on the partonic structure of nuclei, and hadron formation in a nuclear medium, respectively. This analysis takes into account the world data from semi-inclusive electron-nucleus deep inelastic scattering and Drell-Yan di-lepton production in proton-nucleus collisions, comprising a total of 126 data points from 6 data sets with chi^2/dof = 1.045. We quantify for the first time the broadening of partonic distributions in nuclei comparing with those in free nucleons. We also make predictions for the ongoing JLab 12 GeV program and future EIC measurements, which will further constrain the three-dimensional partonic structure of nuclei. |
Wednesday, October 13, 2021 3:36PM - 3:48PM |
LE.00009: Level Density of States in 118Sb Charles E Hultquist, Remco G Zegers A good understanding of nuclear level densities is important for estimating the rate of several types of reactions that are important in astrophysical phenomena. However, the extraction of level densities from experimental data is not straightforward, especially at higher excitation energies, where the density is high and the level spacing is smaller than the experimental resolution. In this work, the level density of states in 118Sb are extracted with a fluctuation analysis by using results from a high-resolution (30 keV FWHM) 118Sn(3He,t) experiment at E(3He)=420 MeV, performed at the Research Center for Nuclear Physics (RCNP) in Osaka, Japan. The level densities are determined by studying the autocorrelation function obtained from the experimental spectra. The backgrounds in the spectra were determined and subtracted by using a discrete wavelet transformation analysis of the spectra with a normalized biorthogonal wavelet. The analysis is performed for spectra at different scattering angles to investigate the effects of contributions from states of different multipolarity, which are preferentially populated at different scattering angles. Parameters in fluctuation analysis and discrete wavelet transform are varied to understand the error present in the analysis. |
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