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

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 to its longitudinal polariz...

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Bibliographic Details
Main Author: Alejandro Ibarra, Marcela Marín, Pablo Roig
Format: Article
Language:English
Published: SciPost 2025-07-01
Series:SciPost Physics Proceedings
Online Access:https://scipost.org/SciPostPhysProc.16.011
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