The Mu2e experiment at Fermilab will search for the neutrinoless (Formula presented.) 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 (Formula presented.) discovery sensitivity is (Formula presented.), with a total expected background of (Formula presented.) events. In the absence of a signal, the expected upper limit is (Formula presented.) at 90% CL. This represents a three order of magnitude improvement over the current experimental limit of (Formula presented.) at 90% CL set by the SINDRUM II experiment.
Mu2e Run I Sensitivity Projections for the Neutrinoless μ− → e− Conversion Search in Aluminum
Tran N.;Wang Y.;Wang C.;Ambrosio G.;Arnold D.;Boi S.;Ibrahim A.;Lombardo V.;Martinez A.;Park C.;Wang M.;Gargiulo R.;Tecchio M.;Wu Y.;Ferrari C.;Giusti V.;Vitali B.;Chen J.;Zanetti A.;
2023
Abstract
The Mu2e experiment at Fermilab will search for the neutrinoless (Formula presented.) 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 (Formula presented.) discovery sensitivity is (Formula presented.), with a total expected background of (Formula presented.) events. In the absence of a signal, the expected upper limit is (Formula presented.) at 90% CL. This represents a three order of magnitude improvement over the current experimental limit of (Formula presented.) at 90% CL set by the SINDRUM II experiment.File | Dimensione | Formato | |
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