Speaker
Kare Fridell
Description
We study charged lepton flavor violating processes $\mu^+\mu^+\to\ell^+\ell'^+$ at a future same-sign muon collider. Working in an effective field theory framework, we compare the potential discovery reach with existing limits from rare $\mu$ and $\tau$ decays, finding that muon colliders are the most sensitive probe of charged lepton flavor violation for a range of parameters. As a model example, we then consider the type-ii seesaw model, and show how a muon collider could be used to constrain the CP-violating phases of the corresponding PMNS matrix.
