Work

NNLO initial-state corrections to $e^+\,e^-\toμ^+\,μ^-\,γ$

Year: 2026

Type: preprint

Abstract: We present initial-state corrections to $e^+\,e^-\toμ^+\,μ^-\,γ$ at next-to-next-to-leading-order in QED for several experimentally motivated scenarios up to a few GeV. We include photonic as well as vacuum-polarisation corrections into the Monte Carlo framework McMule that allows for the calculation of arbitrary infrared-safe observables. For the total cross sections, the corrections are typically below the percent level, but they can be locally larger in distributions. The vacuum-polarisation corrections are of similar size and must not be neglected, in particular for larger centre-of-mass energies.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.09680

Authors: Fang, Yizhou, Gündogdu, Sara, Kollatzsch, Sophie, Rocco, Marco, Signer, Adrian, Ulrich, Yannick

Institutions: University of Zurich, Paul Scherrer Institute, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, University of Turin, University of Liverpool

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Ministerio de Universidades

Awards: Scattering processes at the low-energy high-precision frontier, Precision calculations for lepton scattering

OpenAlex ID: W7221049486

Cites: 6

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Related to: 10