Mu3e Experiment

Search for the lepton-flavour violating decay
$\mu^+ \to e^+ e^+ e^-$


The Mu3e experiment is a new search for the lepton-flavour violating decay of a positive muon into two positrons and one electron. See here for a an overview of the experiment.

Layer 3 pixel detector with installation crew

Layer 3 pixel modules installed

The third layer of the Mu3e pixel detector was sucessfully installed. This is the first time that we deploy these large pixel modules.

Mu3e Collaboration meeting September 2026 - Group Picture

Collaboration meeting at PSI

The Mu3e collaboration got together at PSI for two days of presentations and discussions.

PhD Defense of Sophie

Sophie Dietz defends her PhD

Sophie Dietz has successfully defended her doctoral thesis at the University of Mainz. She has developed the powering system for Mu3e, in particular a very high current DC/DC converter and integrated it into the experiment.

Collaboration Server

(restricted access)