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

30 Aug 2021, 18:00
1h 30m
Poster Neutrino physics and astrophysics Poster session 1


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 which are realised in several well-known radiative models. Either structure implies 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 non-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.

Reference to paper (DOI or arXiv) 2102.09898
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Primary authors

Tobias Felkl (University of New South Wales) Michael A. Schmidt (University of New South Wales) Juan Herrero Garcia (PHD student)

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