Minimal Two-component Scalar Doublet Dark Matter with Radiative Neutrino Mass. (arXiv:1904.04837v1 [hep-ph])

Minimal Two-component Scalar Doublet Dark Matter with Radiative Neutrino Mass. (arXiv:1904.04837v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Borah_D/0/1/0/all/0/1">Debasish Borah</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Roshan_R/0/1/0/all/0/1">Rishav Roshan</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Sil_A/0/1/0/all/0/1">Arunansu Sil</a>

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. Focussing 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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