A data-driven method to estimate the antiproton background in Mu2e

The Mu2e experiment will search for the CLFV process of neutrinoless, coherent conversion of muon to electron in the field of an Al nucleus. One of the expected backgrounds is antiprotons produced by the proton beam at the Production Target and annihilating in the Stopping Target to produce signal-l...

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Bibliographic Details
Published inSciPost physics proceedings no. 17; p. 025
Main Authors Chithirasreemadam, Namitha, Donati, Simone, Murat, Pavel
Format Journal Article
LanguageEnglish
Published SciPost 23.07.2025
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ISSN2666-4003
2666-4003
DOI10.21468/SciPostPhysProc.17.025

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Summary:The Mu2e experiment will search for the CLFV process of neutrinoless, coherent conversion of muon to electron in the field of an Al nucleus. One of the expected backgrounds is antiprotons produced by the proton beam at the Production Target and annihilating in the Stopping Target to produce signal-like electrons. Although not a dominant background, it has a large uncertainty and cannot be suppressed by the timing cuts used to reduce the prompt background. However, at Mu2e energies, p\bar{p} p p ‾ annihilation is the only source of events with multiple, simultaneous particles coming from the Stopping Target. We utilized this unique feature and developed a novel approach to reconstruct multi-track events and estimate the antiproton background.
ISSN:2666-4003
2666-4003
DOI:10.21468/SciPostPhysProc.17.025