Disperon QED

SciPost Physics 2026 Open access

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Authors: Yizhou Fang, Sophie Kollatzsch, Marco Rocco, Adrian Signer, Yannick Ulrich, Max F. Zoller
DOI: 10.21468/scipostphys.20.4.116
Cited by: 4
References: 185

Abstract

We present disperon QED, a method to deal with data input in loop processes in Monte Carlo codes. It relies on dispersion relations, automated tools such as OpenLoops, effective field theory methods and a threshold subtraction. We motivate this method and apply it to the process ee\to\pi\pi e e → π π in McMule to deal with hadronic vacuum polarisation insertions in two-loop contributions as well as the vector form factor of the pion within the form-factor scalar QED approximation. The generality of this method for more complicated processes is emphasised.

Fields of Study & Subjects

Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions High-Energy Particle Collisions Research

Publication details

Journal / source
SciPost Physics
Publisher
Stichting SciPost
Volume
20
Issue
4
Publication date
17 April 2026
Language
EN