Abstract
Mu3e will search for charged Lepton Flavor Violation in the neutrinoless muon decay \mu^+ \rightarrow e^+ e^- e^+μ+→e+e−e+ with a sensitivity down to 10^{-16}10−16 (90% C.L.) using the world most intense continuous muon beam at PSI. This search requires a large acceptance detector capable of coping with rates of up to 2 \times 10^92×109 stopped muons per second with excellent momentum, spatial, and time resolution. The Mu3e detector is based on thin monolithic active silicon pixel sensors for tracking in conjunction with scintillating fibers and tiles for timing measurements. The Mu3e apparatus is under constructions and first data is expected in 2020.
Highlights
In the Standard Model of particle physics lepton flavor is strictly conserved
With a projected sensitivity of 10−16 (90% C.L. in the absence of a signal), Mu3e has the potential of probing new physics at the PeV scale
The compact muon beam line (CMBL), that is already installed in the experimental area of Mu3e, allows to switch between one experiment and the other
Summary
In the Standard Model of particle physics lepton flavor is strictly conserved. The discovery of neutrino oscillations, has shown that lepton flavor conservation is not a symmetry of Nature, the observation of flavor violation in the charged lepton sector is still missing. In extensions of the Standard Model (SM) with neutrino mixing, lepton flavor violating muon decays can be mediated, for example, by loop diagrams (see Figure 1 left). Loop diagrams involving massive neutrinos, are strongly suppressed with branching ratios O ∼ 10−54 and give potentially high sensitivity to charged Lepton Flavor Violation (cLFV) processes, because of the absence of SM backgrounds. In several models [2,3] sizable cLFV effects, accessible to the new generation of high sensitivity experiments, are predicted. Several models, such as grand unified theories (GUTs), supersymmetric models (Figure 1 center), compositness, leptoquarks, left-right symmetric models, seesaw models, etc.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call