Fully differential NLO predictions for the rare muon decay
arXiv:1611.03617 · doi:10.1016/j.physletb.2016.12.039
Abstract
Using the automation program GoSam, fully differential NLO corrections were obtained for the rare decay of the muon $μ\to eν\barνee$. This process is an important Standard Model background to searches of the Mu3e collaboration for lepton-flavour violation, as it becomes indistinguishable from the signal $μ\to 3e$ if the neutrinos carry little energy. With our NLO program we are able to compute the branching ratio as well as custom-tailored observables for the experiment. With minor modifications, related decays of the tau can also be computed.
10 pages, 2 figures