Abstract
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 vector-like charged fermion and scalar multiplets, all odd under an imposed $\mathcal{Z}_2$ 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 vector-like 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.
Highlights
The origin of the neutrino mass is among the most crucial problems of the Standard Model (SM) of particle physics
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
We have proposed a class of models that intercorrelates and offers a simultaneous explanation of neutrino mass, dark matter, the long-standing puzzle of the muon anomalous magnetic moment, and the recently observed tension in the electron anomalous magnetic moment
Summary
The origin of the neutrino mass is among the most crucial problems of the Standard Model (SM) of particle physics. There have been lots of attempts in the literature to combine these two seemingly uncorrelated issues, one of the most prominent example being the scotogenic model [4] In such models, the particles mediating the loop(s) that generate neutrino mass are dark matter. Experiments, and their corresponding theory values are computed with outstanding precision, these observed tensions strongly point toward physics beyond the SM These results recently have entertained a lot of interest in the particle physics community; for attempts to simultaneously explain these discrepancies, see Refs.
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