Bayesian Inferring Nucleon Gravitational Form Factors via Near-Threshold J/ψ Photoproduction.

Authors

Yuxun Guo, Feng Yuan, Wenbin Zhao

Published in

Physical review letters. Volume 135. Issue 11. Pages 111902. Sep 12, 2025.

Abstract

With Bayesian inference, we investigate the impact of recent near-threshold J/ψ production measurements by the J/ψ007 experiment and GlueX Collaboration on the extraction of proton gravitational form factors. We apply the generalized parton distribution framework at the next to leading order and demonstrate a stable expansion for the near-threshold kinematics. We find that the experimental constraints are in good agreement with the state-of-the-art lattice simulations, where negative C_{q}(t) and C_{g}(t) are strongly preferred. This highlights a great potential to extract them from future high-precision experiments.

PMID:
41004741
Bibliographic data and abstract were imported from PubMed on 27 Sep 2025.

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