Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session D03: Experimental and Theoretical Progress in Understanding Short-Range Structure in NucleiInvited
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Sponsoring Units: DNP GFB Chair: Ingo Tews, Los Alamos National Laboratory Room: MG Salon B - 3rd Floor |
Saturday, April 15, 2023 3:45PM - 4:21PM |
D03.00001: Short range correlated nucleon pairs in nuclei and their effects on nuclear and nucleon structure with eA and pA hard reaction measurements Invited Speaker: Or Hen
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Saturday, April 15, 2023 4:21PM - 4:57PM |
D03.00002: Studies of Proton Momentum Distributions in Light Nuclei Invited Speaker: Fatiha Benmokhtar Studies of proton momenum distributions inside light nuclei have attracted significant interest from both experimentalists and theoreticians for decades. This talk review what we have learned about the proton distributions in 3He and 4He nuclei with a focus on the most recent results obtained from Hall A on 4He at Jefferson Lab. This experimental determined cross sections for the 4He(e,e′p)X reactions in the missing energy range from 0.017 to 0.022 GeV and up to a missing momentum of 0.632 GeV/c at xB=1.24 and Q2=2 (GeV/c). The results have been compared to relativistic distorted-wave impulse approximation calculations and show significantly more events for pm≥0.45 GeV/c than are predicted by the theoretical along with a striking fluctuation in the ratio of data to the theoretical model around pm=0.3GeV/c pointing to possible signals of initial-state multinucleon correlations. |
Saturday, April 15, 2023 4:57PM - 5:33PM Withdrawn |
D03.00003: The generalized contact formalism: three-body correlations and other recent results Invited Speaker: Ronen Weiss The generalized contact formalism (GCF) is a useful model for analyzing the properties and implications of nuclear short-range correlations (SRCs). Based on an asymptotic factorization of the wave function when two particles are found close to each other, the GCF was used to study two-body densities and momentum distributions, electron scattering reactions, and more, resulting in a consistent and comprehensive picture regarding the effects of SRC pairs. Based on its success, the GCF asymptotic two-body factorization is expected to be a leading-order term in a short-range expansion of the nuclear wave function. In this talk, after reviewing some of the main results concerning SRC pairs, I will focus on recent advances in the description of three-body correlations and other next-order corrections. I will discuss the connection to inclusive electron-scattering searches for signal of SRC triplets. I will also present recent calculations of neutrinoless double beta decay matrix elements using the GCF to account for SRC effects. |
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