Bulletin of the American Physical Society
2021 Fall Meeting of the APS Prairie Section
Volume 66, Number 14
Thursday–Saturday, November 11–13, 2021; Lewis University, Romeoville Illinois (Hybrid options available)
Session F01: Nuclear and Astrophysics |
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Chair: Joe Kozminski, Lewis University |
Saturday, November 13, 2021 2:30PM - 2:42PM |
F01.00001: Evaluating fitting models of the missing energy contribution of Ar and Ti nuclear shell orbitals using the E12-14-012 (e, e$\prime $ p) scattering experiment at Jefferson Lab Zachary Jerzyk, Adam Dirican The Deep Underground Neutrino Experiment (DUNE) will probe CP-symmetry violation by observing neutrino and antineutrino oscillation rates, detect supernovae neutrinos, and potentially inform new grand unification theories by making the first observation of proton decay. DUNE will use a liquid argon time-projection chamber (LAr-TPC) detector; however, little work has been done on electron-nucleus scattering for isospin nonsymmetric atoms or neutrino-nucleus scattering for argon-40. In the Hall A experiment E12-14-012 at Jefferson Lab, the (e, e$\prime $ p) scattering cross sections of argon (N$=$22) and titanium (Z$=$22) were measured against a detailed Monte Carlo (MC) simulation. Various kinematical cuts were performed on the experimental data and MC for signal identification. Minimization was performed on each orbital's cross section as a function of missing energy against either a Gaussian (symmetric) or Maxwell-Boltzmann (nonsymmetric) distribution and dependence or independence of the function on the mean energy. In this talk, I will discuss how the initial fit models of argon and titanium were modified, how the quality of fit is evaluated, and how this will inform our error analysis on the argon and titanium proton spectral functions. [Preview Abstract] |
Saturday, November 13, 2021 2:42PM - 2:54PM |
F01.00002: Propagating Neutrinos and Charged Leptons Inside the Earth using nuPyProp Sameer Patel The design and development of new balloon and sub-orbital missions capable of detecting upward going extensive air showers caused by neutrino interactions inside the Earth rely on simulations to assess instrument sensitivity to UHE neutrinos. We introduce nuPyProp, which is a simple to use, Monte Carlo package designed to simulate and model UHE neutrino interactions and charged lepton energy loss inside the Earth. nuPyProp is a part of the nuSpaceSim simulation package, and it primarily generates lookup tables for $\nu_\tau\to \tau$ and $\nu_\mu\to \mu$ propagation. It allows for the user to choose from a subset of neutrino cross-section models and charged lepton photonuclear energy loss models, along with the flexibility to create \& use custom models for propagation. I will describe the simulation framework and discuss the impacts of using different models and two different energy loss propagation techniques - stochastic \& continuous on charged lepton exit probabilities and their outgoing energy distributions. [Preview Abstract] |
Saturday, November 13, 2021 2:54PM - 3:06PM |
F01.00003: Plasma Turbulence in the Local Cavity of the Interstellar Medium Steven Spangler The Interstellar Medium consists of matter in space between the stars. For decades, it has been known that the Local Interstellar Medium is dominated by a cavity that is approximately 500 light years in diameter. The physical state and origin of gas within this cavity remain topics for research. The state of turbulence in the cavity gas is also of interest, and radio observations of pulsars can diagnose this turbulence. The existence of ``pulsar arcs'' in radio spectra of pulsars are particularly useful in that they determine the distance to possible thin sheets of turbulent plasma. Recently, Reardon et al (Astrophysical Journal 904, 104, 2021) have measured pulsar arcs for the nearby pulsar J0437-4715. They obtain a precise value for the distance to the primary turbulent sheet of 293 light years (89.8 parsecs). This distance is consistent with the ``wall'' of the Local Cavity in that direction, and suggests that turbulence is generated in the interface between the Local Cavity and surrounding gas. [Preview Abstract] |
Saturday, November 13, 2021 3:06PM - 3:18PM |
F01.00004: Calculation of the actual values of linear and rotational velocity of the universe Gh. Saleh, R. Alizadeh Dahdahli According to big bang theory, the universe began to expand after the big bang, and this expansion is continued to this day and does not have stopped moving just yet. At the beginning of the big bang, the universe expanded more quickly and then reached a relative equilibrium and the objects are moving at their specific velocity relative to their position. In this paper we are going to find an equation that could explain the actual velocity of any celestial objects in the universe. Everything in the universe, from the smallest to the largest objects, is spherical, such as electrons, atoms, the moon, the earth, the sun, etc. So, the universe is also very likely to be spherical. By assuming the universe is spherical and based on conservation of Energy, we have written the equation for velocity of any celestial objects in the universe, which consists of two parts: a rotational part and a linear part. The value of these parts could be obtained by using the energy released in the Big Bang moment, Hubble's law and Redshift/ Blueshift, etc. Based on these, we have derived a velocity-time equation that could explain the motion of any celestial objects from the big bang moment. [Preview Abstract] |
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