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arXiv · 1904.04837

Minimal Two-component Scalar Doublet Dark Matter with Radiative Neutrino Mass

Debasish Borah·Rishav Roshan·Arunansu Sil
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Abstract

We propose a minimal extension of the Standard Model to accommodate two-component dark matter (DM) and light neutrino mass. The symmetry of the Standard Model is enhanced by an unbroken $\mathbb{Z}_2 \times \mathbb{Z}'_2$ such that being odd under each $\mathbb{Z}_2$, there exists one right handed neutrino and one inert scalar doublet. Therefore, each of the $\mathbb{Z}_2$ sectors contribute to ($i$) light neutrino masses radiatively similar to the scotogenic models while ($ii$) the two neutral CP even scalars present in two additional inert doublets play the role of dark matters. Focusing on the intermediate range of inert scalar doublet DM scenario: $M_W \leq M_{\rm DM} \lesssim 500 \; {\rm GeV}$, where one scalar doublet DM can not satisfy correct relic, we show that this entire range becomes allowed within this two-component scalar doublet DM, thanks to the inter-conversion between the two DM candidates in presence of neutrino Yukawa couplings with dark sector.

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Debasish Borah, Rishav Roshan, Arunansu Sil. 2019-09-04. Minimal Two-component Scalar Doublet Dark Matter with Radiative Neutrino Mass. https://doi.org/10.1103/physrevd.100.055027

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