Speaker
Description
Mu3e is an experiment under construction at the Paul Serrer Institute to search for the charged lepton flavor violating $\mu^+ \rightarrow e^+e^-e^+$ decay at branching fractions above $10^{-16}$. As this decay is heavily suppressed in the Standard Model, its observation would unambiguously indicate the existence of new physics. Achieving such sensitivity requires a high rate of muons and a detector with large kinematic acceptance; hence, excellent time resolution is essential to suppress the accidental background and to facilitate the global event reconstruction. In particular, the scintillating fiber (SciFi) sub-detector is mounted in the central Mu3e region and is designed to achieve a very precise time measurement with a very high efficiency and rate capability. In this talk, the SciFi design and performance is presented in the context of the demanding Mu3e detector requirements.
