Radiative seesaw corrections and charged-lepton decays in a model with soft flavour violation

Author(s)
E. H. Aeikens, P. M. Ferreira, W. Grimus, D. Jurčiukonis, L. Lavoura
Abstract

We consider the one-loop radiative corrections to the light-neutrino mass matrix and their consequences for the predicted branching ratios of the five lepton-flavour-violating decays ℓ1−→ℓ2−ℓ3+ℓ3− in a two-Higgs-doublet model furnished with the type-I seesaw mechanism and soft lepton-flavour violation. We find that the radiative corrections are very significant; they may alter the predicted branching ratios by several orders of magnitude and, in particular, they may help explain why BR (μ → ee+e) is strongly suppressed relative to the branching ratios of the decays of the τ. We conclude that, in any serious numerical assessment of the predictions of this model, it is absolutely necessary to take into account the one-loop radiative corrections to the light-neutrino mass matrix.

Organisation(s)
Particle Physics
External organisation(s)
Instituto Superior de Engenharia de Lisboa, Universidade de Lisboa, Associação EURATOM/IST, Vilnius University (VU)
Journal
Journal of High Energy Physics
Volume
2020
No. of pages
28
ISSN
1029-8479
DOI
https://doi.org/10.1007/JHEP12(2020)122
Publication date
12-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103034 Particle physics, 103036 Theoretical physics
Keywords
ASJC Scopus subject areas
Nuclear and High Energy Physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/radiative-seesaw-corrections-and-chargedlepton-decays-in-a-model-with-soft-flavour-violation(7578a7ae-956c-40ef-b975-e185c64f00c1).html