Electroproduction of heavy vector mesons using holographic QCD: from near threshold to high energy regimes

Abstract

We develop a non-perturbative analysis of the electro-production of heavy vector mesons ($\varphi$, $J/\Psi$) from threshold to high energy. We use the holographic construction with bulk confinement enforced through a soft wall. Using Witten diagrams, we evaluate the pertinent cross sections for heavy vector mesons ($\varphi$, $J/\Psi$) production and study their dependence on both the incoming virtual photon polarization as well as the outgoing polarization of the heavy meson. Our results for $J/\Psi$ electro-production compares well with the available HERA data at low and intermediate $Q^2$, and for a wide range of momentum transfer. We also predict the quasi-real electro-production of $J/\Psi$ near threshold.

arXiv comment30 pages (with two columns), 13 figures, extension of our work on photo-production arXiv:1910.04707 with overlapping appendix

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• Measurement of the J/$\psi$ photoproduction cross section over the full near-threshold kinematic region
• Nucleon D-term in holographic QCD
• Perturbative Calculations of Gravitational Form Factors at Large Momentum Transfer
• Near Threshold Heavy Quarkonium Photoproduction at Large Momentum Transfer
• Towards a theory of bottom-up holographic models for linear Regge trajectories of light mesons
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• Measurement of the near-threshold J$/\psi$ photoproduction cross section with the CLAS12 experiment
• Exploring Nucleon Structure and the Proton Mass Problem through Holographic QCD