The Mu3e Experiment: Status and Short-Term Plans
Robert Mihai Amarinei

TL;DR
The Mu3e experiment at PSI is under construction to search for the rare muon decay $\,\mu^+ \rightarrow e^+e^-e^+$, aiming for unprecedented sensitivity to detect physics beyond the Standard Model.
Contribution
This paper reports the current status, technological setup, and short-term plans of the Mu3e experiment, including detector development and construction progress.
Findings
Detector assembly has started.
Commissioning beam time planned for 2025.
Target sensitivity of 10^{-15} in Phase-1.
Abstract
Mu3e is an experiment currently under construction at the Paul Scherrer Institute in Switzerland, designed to search for the Lepton Flavor Violating (LFV) decay . In extensions of the Standard Model (SM) that account for neutrino masses, this decay is theoretically allowed but occurs only through extremely rare loop processes, with a predicted branching ratio of approximately . Such a small probability implies that any observation of this decay would provide clear evidence for physics beyond the SM. The Mu3e experiment aims to probe the decay with a sensitivity of approximately in its Phase-1 and plans to achieve a sensitivity of after future upgrades. To reach its Phase-1 ambitious goals, Mu3e is going to use the most intense continuous muon beam in the…
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Taxonomy
TopicsSuperconducting Materials and Applications · Muon and positron interactions and applications · Particle Detector Development and Performance
