Precision Monte Carlo Tools and Resummation of Soft-Photon Effects for Low-Energy e+e- Scattering

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• Jérémy Paltrinieri, University of Liverpool
• Friday 06 March 2026, 16:00-17:00
• MR19 (Potter Room, Pavilion B), CMS.

If you have a question about this talk, please contact Nelson Lachini.

Robust Monte Carlo generators are crucial for analysing low-energy electron-positron scattering, which is essential for precision tests of the Standard Model, such as the determination of the hadronic vacuum polarisation contribution to the muon. The community-driven initiative RadioMonteCarlow2 (RMCL2) aims to collect, improve, and facilitate the use of tools for differential cross-sections of leptons and hadrons at centre-of-mass energies of a few GeV. In the first part of this talk, I will summarise Phase I (arXiv:2410.22882) of this initiative, providing comparisons of Monte Carlo predictions for muon, pion, and electron pair production in energy-scan and radiative-return experiments. In a second part, I will discuss soft-photon resummation (based on YFS ) and its implementation using tensor decomposition, offering insight into higher-order radiative corrections for these processes.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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