Instrumental uncertainties in radiative corrections for the MUSE experiment

L. Li, S. Strauch*, J. C. Bernauer, W. J. Briscoe, A. Christopher Ndukwe, E. Cline, D. Cohen, K. Deiters, E. J. Downie, I. P. Fernando, A. Flannery, R. Gilman, Y. Ilieva, M. Kohl, I. Lavrukhin, W. Lin, W. Lorenzon, S. Lunkenheimer, P. Mohanmurthy, J. NazeerM. Nicol, T. Patel, A. Prosnyakov, H. Reid, P. E. Reimer, G. Ron, T. Rostomyan, O. M. Ruimi, N. Sparveris, D. Yaari

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The MUSE experiment at the Paul Scherrer Institute is measuring elastic lepton-proton scattering cross sections in a four-momentum transfer range from Q 2 of approximately 0.002–0.08 GeV2 using positively and negatively charged electrons and muons. The extraction of the Born cross sections from the experimental data requires radiative corrections. Estimates of the instrumental uncertainties in those corrections have been made using the ESEPP event generator. The results depend in particular on the minimum lepton momentum that contributes to the experimental cross section and the fraction of events with hard initial-state radiation that is detected in the MUSE calorimeter and is excluded from the data. These results show that the angular-dependent instrumental uncertainties in radiative corrections to the electron cross section are less than 0.4% and are negligible for the muon cross section.

Original languageAmerican English
Article number8
JournalEuropean Physical Journal A
Issue number1
StatePublished - Jan 2024

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Publisher Copyright:
© 2024, The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.


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