September 27, 2021 to October 1, 2021
Indiana University
America/Indiana/Indianapolis timezone

Lepton flavor violating tau decays with a light gauge boson

Sep 28, 2021, 2:15 PM
20m
Virtual (Indiana University)

Virtual

Indiana University

Speaker

Marcela Marín (Cinvestav)

Description

$L\to\ell\chi$ decays (with $\chi$ a boson associated to this lepton flavor violation, LFV) have not been described satisfactorily so far for light spin-one $m_\chi$. In particular, observables exhibited an unphysical divergence in the limit of massless $\chi$, associated to its longitudinal polarizations. Based on gauge symmetry, we show how to correct this issue. To this end, we consider two general models realizing the effective field theory description. Being the LFV generated either at tree level or at one loop, these processes are well behaved for light $m_\chi$. We discuss the most salient phenomenological consequences and its relevance in the searches for this kind of decays.

What is your topic? Lepton universality and flavour violation

Primary author

Marcela Marín (Cinvestav)

Co-authors

Dr Alejandro Ibarra (Technische Universität München) Pablo Roig Garcés

Presentation materials