2021
DOI: 10.48550/arxiv.2102.09898
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The Singly-Charged Scalar Singlet as the Origin of Neutrino Masses

Tobias Felkl,
Juan Herrero-Garcia,
Michael A. Schmidt

Abstract: 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 lepto… Show more

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Cited by 2 publications
(2 citation statements)
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“…B-anomalies, anomalous muon magnetic moment, and CAA Possible combined explanations for all these anomalies has been recently proposed involving the scalar LQ S 1 and a scalar charged singlet φ + [374]. In this scenario S 1 contributes to R(D ( * ) ) and a μ in the same way as described above, while φ + generates a tree-level contribution to the muon decay μ − → e − ν μ νe that, shifting the Fermi constant, improves the fit of the Cabibbo angle [361,372,373,424]. The contribution to b → sμμ is instead induced via a oneloop box diagram involving both S 1 and φ.…”
Section: B-anomalies and Anomalous Muon Magnetic Momentmentioning
confidence: 94%
“…B-anomalies, anomalous muon magnetic moment, and CAA Possible combined explanations for all these anomalies has been recently proposed involving the scalar LQ S 1 and a scalar charged singlet φ + [374]. In this scenario S 1 contributes to R(D ( * ) ) and a μ in the same way as described above, while φ + generates a tree-level contribution to the muon decay μ − → e − ν μ νe that, shifting the Fermi constant, improves the fit of the Cabibbo angle [361,372,373,424]. The contribution to b → sμμ is instead induced via a oneloop box diagram involving both S 1 and φ.…”
Section: B-anomalies and Anomalous Muon Magnetic Momentmentioning
confidence: 94%
“…B-anomalies, anomalous muon magnetic moment, and CAA Possible combined explanations for all these anomalies has been recently proposed involving the scalar LQ S 1 and a scalar charged singlet φ + [374]. In this scenario S 1 contributes to R(D ( * ) ) and a µ in the same way as described above, while φ + generates a tree-level contribution to the muon decay µ − → e − ν µ νe that, shifting the Fermi constant, improves the fit of the Cabibbo angle [361,372,373,424]. The…”
Section: Combined Explanationsmentioning
confidence: 94%