May 31, 2022 to June 1, 2022
America/Bogota timezone

Flavor violating $\ell_i$ decay into $\ell_j$ and a light gauge boson

May 31, 2022, 2:00 PM


Bibiana Marcela Marín Ochoa


The $\ell_i\to\ell_j\chi$ decays, with $\chi$ a boson associated to the $U(1)_\chi$ symmetry, have not been described satisfactorily so far for light spin-one $\chi$. In particular, observables exhibited an unphysical divergence in the limit of massless $\chi$, associated with 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 is 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.

Primary author


Dr Pablo Roig (Cinvestav) Dr Alejandro Ibarra (Technische Universität München)

Presentation materials