2022/10/20 by Mu e Collaboration, Mu2e Collaboration
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Neutrino Physics Research #Particle accelerators and beam dynamics #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2210.11380
openalex publication_date 2022/10/20 · openalex created_date 2022/10/24 · openalex updated_date 2026/07/28
The Mu2e experiment at Fermilab will search for the neutrinoless μ- → e- conversion in the field of an aluminum nucleus. The Mu2e data-taking plan assumes two running periods, Run I and Run II, separated by an approximately two-year-long shutdown. This paper presents an estimate of the expected Mu2e Run I search sensitivity and includes a detailed discussion of the background sources, uncertainties of their prediction, analysis procedures, and the optimization of the experimental sensitivity. The expected Run I 5 σ discovery sensitivity is Rμe = 1.2 × 10-15, with a total expected background of 0.11 ± 0.03 events. In the absence of a signal, the expected upper limit is Rμe < 6.2 × 10-16 at 90% CL. This represents a three order of magnitude improvement over the current experimental limit of Rμe < 7 × 10-13 at 90% CL set by the SINDRUM II experiment.