The singly-charged scalar singlet as the origin of neutrino masses

2021/02/28 by Tobias Felkl, Juan Herrero-García, Juan Herrero-Garcia +1
Physics and Astronomy · Social Sciences · #Antisymmetric relation #International Science and Diplomacy #Lepton #Neutrino #Neutrino Physics Research #Neutrino oscillation #Parameter space #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Scalar (mathematics) #Singlet state #Yukawa potential #hep-ph

paper · pdf · doi:10.1007/jhep05(2021)122

published as JHEP 05 (2021) 122 · 38 pages, 12 figures, 2 tables, published in JHEP, references added, minor clarifications added

openalex created_date 2021/03/01 · openalex publication_date 2021/05/01 · arxiv created 2021/06/04 · arxiv updated 2021/06/07 · openalex updated_date 2026/08/05

Abstract

A bstract 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.

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