Dark matter assisted lepton anomalous magnetic moments and neutrino masses

We propose a framework that addresses the origin of neutrino mass, explains the observed discrepancies in the electron and the muon anomalous magnetic moments (AMMs) data, and incorporates the dark matter (DM) relic abundance. Both the neutrino mass and the lepton AMMs are generated at one-loop leve...

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Bibliographic Details
Published in:Physical review. D 2020-10, Vol.102 (7), p.075003-1, Article 075003
Main Authors: Jana, Sudip, P. K., Vishnu, Rodejohann, Werner, Saad, Shaikh
Format: Article
Language:English
Subjects:
Anomalies
Dark matter
extensions of fermion sector
extensions of Higgs sector
Fermions
hypothetical particle physics models
Leptons
magnetic moment
Magnetic moments
Muons
Neutrinos
particle dark matter
Phenomenology
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Summary:We propose a framework that addresses the origin of neutrino mass, explains the observed discrepancies in the electron and the muon anomalous magnetic moments (AMMs) data, and incorporates the dark matter (DM) relic abundance. Both the neutrino mass and the lepton AMMs are generated at one-loop level mediated by a common set of beyond the Standard Model (SM) states. In this class of models, the SM is extended with vectorlike charged fermion and scalar multiplets, all odd under an imposed Z2 symmetry, which stabilizes the fermionic or scalar DM candidate residing in one of them. Two scalar multiplets appear in the AMM loops, thus allowing for different signs of their contributions, in agreement with the observed discrepancies which are of opposite sign for electron and muon. The vectorlike fermions give rise to large new physics contributions to the lepton AMMs via chirally enhanced terms that are proportional to their mass. To demonstrate the viability of this framework, we perform a detailed study of a particular model for which a fit to the neutrino masses and mixing together with lepton AMMs are provided. Furthermore, DM phenomenology and collider signatures are explored.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.102.075003