Wednesday 17 May 2017 Speaker: Prof Mark Lancaster (UCL) Title: "The Fermilab Mu2e Experiment” Abstract: In the SM the only mechanism to violate charged lepton flavour conservation is via neutrino oscillations which results in a branching rate for neutrinoless muon interactions of order 10^-50. As such any observation of a neutrinoless muon interaction would be evidence of new physics. In this talk I will describe the Fermilab Mu2e experiment that is seeking to detect the neutrinoless conversion of a muon to an electron in the field of a nucleus using 10^20 muons with a branching ratio sensitivity down to 6x10^-17 : a factor of 10^4 better than the previous limit which allows the experiment to probe new physics mass scales up to 8000 TeV, well beyond that probed by direct searches at the LHC.