TY  - JOUR
AU  - Felkl, T.
AU  - Herrero-Garcia, J.
AU  - Schmidt, M. A.
PY  - 2021
DA  - 2021//
TI  - The singly-charged scalar singlet as the origin of neutrino masses
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 122
EP  - 39pp
VL  - 05
IS  - 5
PB  - Springer
KW  - Beyond Standard Model
KW  - Neutrino Physics
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2102.09898
UR  - https://doi.org/10.1007/JHEP05(2021)122
DO  - 10.1007/JHEP05(2021)122
LA  - English
N1  - WOS:000656967200001
ID  - Felkl_etal2021
ER  -