TL;DR
This paper calculates the next-to-next-to-leading order (NNLO) leptonic radiative corrections for muon-electron scattering, crucial for the MUonE experiment's high-precision measurement of the muon anomalous magnetic moment.
Contribution
It provides the first detailed computation of NNLO virtual and real leptonic corrections for muon-electron scattering relevant to the MUonE experiment.
Findings
NNLO corrections significantly affect scattering predictions.
The upgraded Monte Carlo code MESMER accurately models these corrections.
Results support the experiment's goal of 10ppm precision.
Abstract
The recently proposed MUonE experiment at CERN aims at providing a novel determination of the leading order hadronic contribution to the muon anomalous magnetic moment through the study of elastic muon-electron scattering at relatively small momentum transfer. The anticipated accuracy of the order of 10ppm demands for high-precision predictions, including all the relevant radiative corrections. The fixed-order NNLO radiative corrections due to the emission of virtual and real leptonic pairs are described and their numerical impact is discussed for typical event selections of the MUonE experiment, by means of the upgraded Monte Carlo code MESMER.
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Code & Models
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