Friday, March 24, 2017 - 13:00
Conversion of Bound Muons: Lepton Flavour and Number Violation
We discuss the lepton flavour and number violating conversion of bound muons into electrons/positrons in detail. Given that experiments on ordinary $\mu^-$-- $e^-$ conversion are expected to improve their sensitivities by several orders of magnitude in the coming years, this processes will lead to strong constraints on the model space which could even challenge current LHC bounds. Furthermore, one can assume the limit on $\mu^-$-- $e^+$ conversion to improve by roughly the same factor, which means that this process might be a viable alternative to neutrinoless double beta decay. We introduce an effective field theory treatment for both processes, respectively, to allow for a clean separation of nuclear physics from the particle physics in order to make the respective computation accessible to the particle physics community. For illustrative purposes, we discuss how to tackle these computations by using a model in which the Standard Model is extended by only a doubly charged scalar particle. We then illustrate the potential impact of measuring muon conversion processes and point out open issues.