Bulletin of the American Physical Society
2018 Annual Meeting of the APS Mid-Atlantic Section
Volume 63, Number 20
Friday–Sunday, November 9–11, 2018; College Park, Maryland
Session F03: Nuclear Physics I |
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Chair: Erik Blaufuss, University of Maryland, College Park Room: Edward St. John 2212 |
Saturday, November 10, 2018 1:30PM - 2:06PM |
F03.00001: The Meson Spectrum from GlueX Invited Speaker: Greg Kalicy QCD is the fundamental theory for strong interactions describing bound states of quarks and gluons called hadrons. The discovery in the past decade of new kinds of hadrons that did not fit to expectations created new momentum of interest in the field of meson spectroscopy. These so-called exotic states are deeply connected to phenomenology of QCD and offer the opportunity to gain a deeper understanding of QCD bound states. An important part of 12 GeV program at Thomas Jefferson National Accelerator Facility (Jefferson Lab) is the GlueX experiment, designed to produce and study many of those exotic sates. The very exciting physics of GlueX will be further enhanced by a novel type of Cherenkov detector called the DIRC, which will be used to tag strange decays of the new exotic states.The GlueX experiment has started data taking in late 2014 with its first commissioning beam. All of the detector systems are now performing at or near design specifications and events are being fully reconstructed. |
(Author Not Attending)
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F03.00002: Entanglement Entropy of Proton and Neutron Wave Functions in Atomic Nuclei Oliver Gorton, Calvin Johnson Entanglement entropy is a measure of the amount of information shared between two subsystems of a bipartite system. It can be shown that the representations of bipartite wave functions with lower entanglement entropy are dominated by fewer terms than ones with higher entanglement entropy. We compute the entanglement entropy between protons and neutrons in nuclear configuration-interaction wave functions and we find that the entanglement entropy decreases with increasing isospin. This suggests that N > Z nuclei will have even more efficient representations than N = Z nuclei in a proton-neutron factorization scheme, of the kind suggested by the singular- value-decomposition work of Papenbrock et al. Here we take a more in depth look at the entanglement entropy of configuration-interaction wave functions and explain our observations with the aid of a toy model. |
Saturday, November 10, 2018 2:18PM - 2:54PM |
F03.00003: From Quarks to Nucleons in A=3 Nuclei Invited Speaker: Florian Hauenstein The A=3 mirror nuclei are a well understood isospin doublet with a large asymmetry (A/2Z = 1.5) which is exactly calculable for a given NN interaction. While 3He is a simple target for experiments, its mirror nucleus 3H is more difficult to handle due to its radioactivity. Fortunately, a Tritium gas target cell is available at Jefferson Lab's experimental Hall A for electron scattering experiments. In my talk, I will present preliminary results from two of the recently conducted experiments on Tritium in Hall A, MARATHON and SRC(e,e'p). The aim of the MARATHON experiment is measuring the proton to neutron structure function ratio, F2p/F2n, using deep inelastic scattering on the mirror nuclei, resulting in lower theoretical uncertainties than comparable measurements on hydrogen and deuterium. In parallel, it will determine the nucleon modification in nuclei (EMC effect) for Tritium and 3He. |
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