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Exclusive J/ψ+γ production in ultraperipheral ion collisions

Zi-Qiang Chen and Long-Bin Chen*

  • *Contact author: chenlb@gzhu.edu.cn
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Phys. Rev. D 112, 056013 – Published 12 September, 2025

DOI: https://doi.org/10.1103/p3yc-hqly

Abstract

Ultraperipheral collisions (UPCs) of ions provide new opportunities to study the quarkonium production mechanism in photon-photon scattering. In this paper, we investigate the exclusive process γ+γ→J/ψ+γ up to O(αsv2) accuracy within the nonrelativistic quantum chromodynamics factorization framework. We evaluate the corresponding cross sections for Pb-Pb and p-p UPCs at the Large Hadron Collider. Numerical results show that the O(αs), O(v2), and O(αsv2) corrections are about −50%, −33%, and 15% of the leading-order (LO) contribution, respectively, showing reasonable convergence in both αs and v2 expansion. Collectively, these corrections suppress the LO cross section by a factor of about 1/3, which is a crucial effect for reliable phenomenological analysis. Our results suggest that future experimental measurements of this process are feasible.

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Phys. Rev. D 112, 056013– Published 12 September, 2025
  • Received 12 August 2025
  • Accepted 25 August 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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