Leptogenesis and dark matter unified in a non-SUSY model for neutrino masses

Abstract

We propose a unified explanation for the origin of dark matter and baryon number asymmetry on the basis of a non-supersymmetric model for neutrino masses. Neutrino masses are generated in two distinct ways, that is, a tree-level seesaw mechanism with a single right-handed neutrino, and one-loop radiative effects by a new additional doublet scalar. A spontaneously broken U(1)${}^{\prime }$ brings a $Z_2$ symmetry which restricts couplings of this new scalar and controls the neutrino masses. It also guarantees the stability of a CDM candidate. We examine two possible candidate for the CDM. We also show that the decay of a heavy right-handed neutrino related to the seesaw mechanism can generate baryon number asymmetry through leptogenesis.

21 pages, 3 figures, extended version for publication, references added

References in corpus (2)

• Significant Gamma Lines from Inert Higgs Dark Matter
• Dark Matter, Muon g-2 and Other SUSY Constraints

Cited by in corpus (3)

• Fermion Triplet Dark Matter and Radiative Neutrino Mass
• Reconciliation of CDM abundance and $\mu \to e\gamma$ in a radiative seesaw model
• Anomaly Induced Dark Matter Decay and PAMELA/ATIC Experiments