Spin resummation of heavy quarkonium photoproduction: from the gluonic gravitational form factors to the holographic pomeron

2026/07/27 by Kiminad A. Mamo, Kemal Tezgin, Christian Weiss
#hep-ph #hep-th #nucl-th

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Abstract

Exclusive heavy quarkonium photoproduction probes the proton's gluonic structure from near-threshold (fixed-spin exchanges, gravitational form factors) to high energies (reggeized dynamics). We construct a holographic QCD amplitude that resums the even spin-j gluonic exchanges, with the spin-2 input fixed by lattice QCD GFFs. The new framework describes the J/ψ cross section from JLab to HERA energies in a unified manner. It explains why the spin-2 exchange model for GFF extraction near threshold is not a controlled approximation and suggests how to improve it.

Citations

• A Journey of Seeking Pressures and Forces in the Nucleon
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• Entanglement, Trace Anomaly and Confinement in QCD
• Gravitational form factors and mechanical properties of the nucleon in a meson dominance approach
• Dispersive Determination of Nucleon Gravitational Form Factors
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• Heavy Quarkonium Production at Threshold: from JLab to EIC
• Skewness Dependence of GPD / DVCS, Conformal OPE and AdS/CFT Correspondence II: a holographic model of GPD
• Elastic and Proton-Dissociative Photoproduction of J/psi Mesons at HERA
• Quarkonium Interactions in QCD

Related

• Proton's gluon GPDs at large skewness and gravitational form factors from near threshold heavy quarkonium photo-production
• "Rosenbluth" separation of the J/ψ near-threshold photoproduction -- an access to the gluon Gravitational Form Factors at high t
• Unified Resummation of Soft Gluon Radiation in Heavy Meson Pair Photoproduction
• Gluonic gravitational form factors of the proton
• Heavy Quarkonium Production at Threshold: from JLab to EIC