Neutrino magnetic moment and inert doublet dark matter in a Type-III radiative scenario

Abstract

We narrate dark matter, neutrino magnetic moment and mass in a Type-III radiative scenario. The Standard Model is enriched with three vector-like fermion triplets and two inert doublets to provide a suitable platform for the above phenomenological aspects. The inert scalars contribute to total relic density of dark matter in the Universe. Neutrino aspects are realized at one-loop with magnetic moment obtained through charged scalars, while neutrino mass gets contribution from charged and neutral scalars. Taking inert scalars up to $2$ TeV and triplet fermion in few hundred TeV range, we obtain a common parameter space, compatible with experimental limits associated with both neutrino and dark matter sectors. Using a specific region for transition magnetic moment ($\mathcal{O}(10^{-11}{\mu }_B$)), we explain the excess recoil events, reported by the XENON1T collaboration. Finally, we demonstrate that the model is able to provide neutrino magnetic moments in a wide range from $10^{-12}{\mu }_B$ to $10^{-10}{\mu }_B$, meeting the bounds of various experiments such as Super-K, TEXONO, Borexino and XENONnT.

21 pages, 9 figures, version to appear in PRD

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