Automated higher-order predictions for ultra-peripheral collisions with full impact-parameter dependence

Frank Krauss; Peter Meinzinger

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arXiv · 2607.18834

Automated higher-order predictions for ultra-peripheral collisions with full impact-parameter dependence

Frank Krauss·Peter Meinzinger

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Abstract

We present an automated framework within the Sherpa event generator for the simulation of photon-induced processes in high-energy collisions of protons and nuclei. The calculation builds upon the equivalent-photon approximation and incorporates different form factor parametrisations, taking into account the full dependence on the finite size of emitters and their impact parameter. Higher-order effects are taken into account automatically by either YFS-resummation of soft photon emissions to all orders or Next-to-Leading Order in electroweak theory. We validate our simulation framework using data from two representative ATLAS measurements of exclusive $\mu$-pair production in $pp$ and Pb+Pb collisions. Exemplary predictions for exclusive $W$-pair production in $pp$ collisions and $\tau$-pair production in both $pp$ and Pb+Pb collisions are presented.

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Frank Krauss, Peter Meinzinger. 2026-07-21. Automated higher-order predictions for ultra-peripheral collisions with full impact-parameter dependence. https://arxiv.org/abs/2607.18834

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