Minimal two-component scalar doublet dark matter with radiative neutrino mass

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 Z(2) x Z(2)' such that being odd under each Z(2), there exists one right-handed neutrino and one inert scalar doublet. Therefore, each of the 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 <= M-DM less than or similar to 500 GeV, where one scalar doublet DM cannot satisfy correct relic, we show that this entire range becomes allowed within this two-component scalar doublet DM, thanks to the interconversion between the two DM candidates in the presence of neutrino Yukawa couplings with dark sector.