High Energy Physics - Phenomenology
[Submitted on 11 May 2023 (v1), last revised 17 Jul 2023 (this version, v2)]
Title:Updated analysis of near-threshold heavy quarkonium production for probe of proton's gluonic gravitational form factors
View PDFAbstract:There has been growing interest in the near-threshold production of heavy quarkonium which can access the gluonic structure in the nucleon. Previously we studied this process with quantum chromodynamics (QCD) and showed that it can be factorized with the gluon generalized parton distributions (GPDs) in the heavy quark limit. We further argued that the hadronic matrix element is dominated by its leading moments corresponding to the gluonic gravitational form factors (GFFs) in this limit. Since then, there have been many new developments on this subject. More experimental measurements have been made and published, and the lattice simulation of gluonic GFFs has been improved as well. In this work, we make an important revision to a previous result and perform an updated analysis with the new inputs. We also study the importance of the large momentum transfer to extract these gluonic structures reliably in this framework.
Submission history
From: Yuxun Guo [view email][v1] Thu, 11 May 2023 17:28:12 UTC (755 KB)
[v2] Mon, 17 Jul 2023 21:29:37 UTC (825 KB)
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