Low Scale Leptogenesis and Dark Matter Candidates in an Extended Seesaw Model

TL;DR

This paper proposes a low-scale leptogenesis model with extended seesaw involving singlet neutrinos and scalars, exploring dark matter candidates and experimental detection prospects at colliders.

Contribution

It introduces a novel extended seesaw framework that achieves low-scale leptogenesis and identifies potential dark matter candidates within this model.

Findings

Successful realization of low-scale leptogenesis

Identification of singlet neutrino and scalar as dark matter candidates

Potential detection signals at LHC through invisible Higgs decay

Abstract

We consider a variant of seesaw mechanism by introducing extra singlet neutrinos and singlet scalar boson, and show how low scale leptogenesis is successfully realized in this scenario. We examine if the newly introduced neutral particles, either singlet Majorana neutrino or singlet scalar boson, can be a candidate for dark matter. We also discuss the implications of the dark matter detection through the scattering off the nucleus of the detecting material on our scenarios for dark matter. In addition, we study the implications for the search of invisible Higgs decay at LHC, which may serve as a probe of our scenario for dark matter.