The Mu2e experiment: testing the Charged Lepton Flavor Violation
Jose Andres Monroy Comprehensive exam
3:00 pm
Jorgensen Hall Room: 245
Abstract:
The current version of the standard model (SM) suggests lepton ?avor conservation, however, the discovery of neutrino oscillations contradict this conservation, justify the necessity of an updated theory and open the door to the existence of undiscovered phenomena in particular, the possibility of charged lepton ?avor violation (CLFV). Even though it is not explicitly forbidden by the SM, the CLFV is highly suppressed; for µ ? e+? the SM prediction for the conversion rate is Rµe ? O(10?54).
Several experiments have been proposed and developed to test the existence of CLFV processes with no evidence of them, however, an upper limit have been set. The present limit for µ?e conversions in the coulomb ?eld of a nucleus proposed by SINDRUM II experiment is Rµe(µ?+N ? e?+N) = 7.0×10?13.
The Mu2e experiment is designed to measure the conversion rate of a negative muon into an electron in the coulomb ?eld of an aluminum nucleus. The signature of the process is a mono-energetic electron with energy very close to the muon rest mass. The goal of the Mu2e experiment is to improve the present limit by four orders of magnitude. Several beyond SM models like SUSY or leptoquarks predict conversion rates within the range reachable for Mu2e. In this paper, the sensitivity to new physics scale, the experimental technique, the structure of the apparatus and estimation yields from simulation and reconstruction for signal and backgrounds are described.
The current version of the standard model (SM) suggests lepton ?avor conservation, however, the discovery of neutrino oscillations contradict this conservation, justify the necessity of an updated theory and open the door to the existence of undiscovered phenomena in particular, the possibility of charged lepton ?avor violation (CLFV). Even though it is not explicitly forbidden by the SM, the CLFV is highly suppressed; for µ ? e+? the SM prediction for the conversion rate is Rµe ? O(10?54).
Several experiments have been proposed and developed to test the existence of CLFV processes with no evidence of them, however, an upper limit have been set. The present limit for µ?e conversions in the coulomb ?eld of a nucleus proposed by SINDRUM II experiment is Rµe(µ?+N ? e?+N) = 7.0×10?13.
The Mu2e experiment is designed to measure the conversion rate of a negative muon into an electron in the coulomb ?eld of an aluminum nucleus. The signature of the process is a mono-energetic electron with energy very close to the muon rest mass. The goal of the Mu2e experiment is to improve the present limit by four orders of magnitude. Several beyond SM models like SUSY or leptoquarks predict conversion rates within the range reachable for Mu2e. In this paper, the sensitivity to new physics scale, the experimental technique, the structure of the apparatus and estimation yields from simulation and reconstruction for signal and backgrounds are described.