Perturbative QCD analysis of near threshold heavy quarkonium photoproduction at large momentum transfer

2021/03/31 by Peng Sun, Xuan-Bo Tong, Feng Yuan
Physics and Astronomy · #High-Energy Particle Collisions Research #Momentum (technical analysis) #Momentum transfer #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Quarkonium #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1016/j.physletb.2021.136655

fig.2 updated, references added; 6 pages, 3 figures

arxiv created 2021/04/06 · openalex publication_date 2021/09/20 · arxiv updated 2021/09/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We apply perturbative QCD to investigate the near threshold heavy quarkonium photoproduction at large momentum transfer. From an explicit calculation, we show that the conventional power counting method will be modified and the three quark Fock state with nonzero orbital angular momentum dominates the near threshold production. It carries a power behavior of 1/(−t)5 for the differential cross section. We further comment on the impact of our results on the interpretation of the experiment measurement in terms of the gluonic gravitational form factors of the proton.

Citations

• Generalized parton distributions
• Wave function corrections and off-forward gluon distributions in diffractiveJ/ψelectroproduction
• QCD Analysis of the Mass Structure of the Nucleon
• Three-quark light-cone amplitudes of the proton and quark orbital-motion-dependent observables
• A QCD calculation of the interaction of quarkonium with nuclei
• Proton mass decomposition: naturalness and interpretations

Cited by

• Gluon gravitational form factors at large momentum transfer