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

TL;DR

This paper proposes a model extending the Standard Model with vector-like fermion triplets and inert doublets to explain dark matter, neutrino magnetic moments, and mass, consistent with experimental constraints and XENON1T excess.

Contribution

It introduces a Type-III radiative scenario with inert scalars and triplet fermions to simultaneously address dark matter relic density, neutrino magnetic moments, and mass.

Findings

Model explains XENON1T excess recoil events.

Neutrino magnetic moments range from 10^{-12} to 10^{-10} μ_B.

Compatible with experimental bounds from Super-K, TEXONO, Borexino, and XENONnT.

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 (${\cal O} (10^{-11}\mu_B$)), 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.