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We study an extension of the scotogenic model with a real singlet scalar. Itgives an origin of the mass of right-handed neutrinos and plays a role ofinflaton through a non-minimal coupling with Ricci scalar. While an inertdoublet scalar is an indispensable ingredient for neutrino mass generation inthe model, it is also a promising dark matter (DM) candidate. Introduction ofthe singlet scalar could affect its nature of DM if mass of the singlet scalaris in a resonance region. We focus our study on such a case where inflaton massis expected to be in a TeV range and reheating temperature is less than $10^9$GeV. Thus the model requires low scale leptogenesis. After examining severaleffects brought about by the singlet scalar for the DM sector, we discuss DMphenomenology such as high energy neutrinos and monochromatic gammas caused byits annihilation.

Inflation and DM phenomenology in a scotogenic model extended with a real singlet scalar