With the advent of precision measurements of photon-fusion processes in ultraperipheral collisions (UPCs) at facilities, such as RHIC and the LHC, the inclusion of higher-order corrections has become essential. While automated frameworks already make NLO corrections feasible for parton-parton scattering processes, no comparable tools had previously been available for UPC processes in two-photon collisions. In these proceedings, we review some recent explicit NLO computations and present the updated gamma-UPC+MadGraph5_aMC@NLO framework, the first automated software that enables NLO-accurate predictions for photon-photon processes in UPCs.
@article{arxiv.2508.20775,
title = {Progress in NLO Calculations for gamma-gamma Physics},
author = {Hua-Sheng Shao and Lukas Simon},
journal= {arXiv preprint arXiv:2508.20775},
year = {2025}
}
Comments
10 pages, 5 figures, 1 table; 2nd International Workshop on the physics of Ultra Peripheral Collisions (UPC 2025)