Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session 3WGA: When Color meets Gravity: Gravitational Form Factors of the Nucleon IInvited Workshop
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Chair: Zein-Eddine Meziani, Argonne National Laboratory Room: Hilton Waikoloa Village Queens 6 |
Monday, November 27, 2023 9:00AM - 9:30AM |
3WGA.00001: Proton mass and trace anomaly: an overview Invited Speaker: Yoshitaka Hatta Recently, there have been strong activities, both theoretically and experimentally, in understanding the mass and spin structures of the nucleon, or more generally, the gravitational form factors that encode this information. I will give an overview talk of the recent theoretical developments in this direction. Specifically, I will talk about various aspects of the QCD trace anomaly (or the gluon condensate) including its relevance to high and low-energy experiments. |
Monday, November 27, 2023 9:30AM - 10:00AM |
3WGA.00002: Gravitational form factors in holographic QCD Invited Speaker: Ismail Zahed The origin of mass and spin in the proton at low resolution, stems from the primordial glue in the QCD vacuum. |
Monday, November 27, 2023 10:00AM - 10:30AM |
3WGA.00003: Probing the gluonic gravitational form factors of the proton using near-threshold J/Ψ photoproduction. Invited Speaker: Shivangi Prasad Measurements of near threshold quarkonia photoproduction cross sections provides a unique probe of gluons inside the nucleon, hence allowing the extraction of its gluonic form factors and mass structure. Experiments conducted in Hall C ((E12-16-007), Hall B (E12-12-001, E12-12-001A, E12-11-003B) and Hall D (GlueX) at Jefferson Lab, measured J/Ψ differential cross sections as a function of photon energy Eγ and Mandelstam variable t (momentum transfer from initial photon to the produced J/Ψ) in the threshold region. These two dimensional cross section results from Hall C J/Ψ-007 1 and Hall D GlueX 2,3 experiments were published recently. The results are from the e-e+ decay channel of the produced J/Ψ. We will present new results from the μ-μ+ channel in the case of the Hall C J/Ψ-007 experiment. Together with the published results we will explore their impact on our knowledge of the proton’s gluonic mechanical properties due to the improved total statistical uncertainty. |
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