Jul 26 – 30, 2021
Europe/Berlin timezone

The Singly-Charged Scalar Singlet as the Origin of Neutrino Masses

Jul 26, 2021, 10:00 AM


Parallel session talk Neutrino Physics T04: Neutrino Physics


Tobias Felkl (University of New South Wales)


We consider the generation of neutrino masses via a singly-charged scalar singlet. Under general assumptions we identify two distinct structures for the neutrino mass matrix. This yields a constraint for the antisymmetric Yukawa coupling of the singly-charged scalar singlet to two left-handed lepton doublets, irrespective of how the breaking of lepton-number conservation is achieved. The constraint disfavours large hierarchies among the Yukawa couplings. We study the implications for the phenomenology of lepton-flavour universality, measurements of the $W$-boson mass, flavour violation in the charged-lepton sector and decays of the singly-charged scalar singlet. We also discuss the parameter space that can address the Cabibbo Angle Anomaly.

First author Tobias Felkl
Email t.felkl@unsw.edu.au
Collaboration / Activity PhD Research Project

Primary authors

Tobias Felkl (University of New South Wales) Michael Schmidt (UNSW Sydney) Juan Herrero-Garcia (IFIC)

Presentation materials