https://doi.org/10.1140/epjc/s10052-025-14542-x
Regular Article - Theoretical Physics
Charmonium pair production in ultraperipheral collision
1
College of Physics, Sichuan University, 610065, Chengdu, Sichuan, China
2
School of Physics and Materials Science, Guangzhou University, 510006, Guangzhou, China
3
Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, 516000, Huizhou, Guangdong, China
a
chenziqiang13@gzhu.edu.cn
b
bingwei@scu.edu.cn
Received:
21
April
2025
Accepted:
14
July
2025
Published online:
24
July
2025
We study the exclusive double charmonium 
and 
production through photon–photon fusion via ultraperipheral collision (UPC) at the HL-LHC and FCC with next-to-leading order (NLO) QCD predictions in the framework of non-relativistic QCD (NRQCD). Numerical results indicate that the NLO corrections for 
pair are large and negative, while positive for 
pair. The total cross section of 
in Pb–Pb UPC is 28.0 (65.1) nb at nucleon–nucleon c.m. energy 
TeV. Due to the backgrounds from various QCD interactions at UPC are highly suppressed and the event topologies for charmonium pair are easy to tag, the phenomenological studies at the LHC and FCC are feasible. The detailed transverse momentum 
diphoton invariant mass 
and the rapidity difference 
distributions are given. The production for X(6900) is also discussed.
© The Author(s) 2025
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3.
