Speaker
Emanuelle Pinsard
(University of Zurich)
Description
We study charged lepton flavour violation in heavy neutral lepton (HNL) extensions of the Standard Model, computing cross-sections and angular observables for $\mu^+ e^- \to \ell_\alpha \ell_\beta$ scattering.
We investigate the future sensitivity of a $\mu$TRISTAN collider to these processes and its ability to constrain the HNL parameter space.
Our results show that the prospects for $\ell-\tau$ flavour violation searches at $\mu$TRISTAN could surpass those of related low-energy probes and Z-pole processes at FCC-ee, by several orders of magnitude.