Design, R&D and status of the crystal calorimeter for the Mu2e experiment

Abstract

The Mu2e Experiment at Fermilab will search for coherent, neutrinoless conversion of muons into electrons in the field of a nucleus, with a sensitivity improvement of a factor of 10^4 over previous experiments. Such a charged lepton flavor-violating reaction probes new physics at a scale inaccessible with direct searches at either present or planned high energy colliders. The conversion electron is mono-energetic with an energy slightly below the muon rest mass. If no events are observed in three years of running, Mu2e will set a limit on the ratio between the conversion rate and the capture rate, R_{μe}, of < 6 x 10^{-17} (@ 90% CL). In this paper, the physics motivation for Mu2e and the current status of the electromagnetic calorimeter project are briefly presented.

arXiv commentPresented at the 5th YRW "Physics Challenges in the LHC Era". Submitted to Frascati Physics Series