Triplet seesaw model: from inflation to asymmetric dark matter and leptogenesis

TL;DR

This paper presents a unified triplet seesaw model linking inflation, dark matter, and leptogenesis, using Bayesian analysis to fit cosmological and experimental data, including recent direct detection results.

Contribution

It introduces a comprehensive framework connecting inflation, dark matter, and baryogenesis via leptogenesis within the triplet seesaw model, incorporating recent experimental constraints.

Findings

Model successfully explains baryon asymmetry and dark matter density.

Compatible with inflationary and direct detection constraints.

Incorporates recent experimental data like CRESST-II and XENON100.

Abstract

The nature of dark matter (DM) particles and the mechanism that provides their measured relic abundance are currently unknown. Likewise, the nature of the inflaton is unknown as well. We investigate the triplet seesaw model in an unified picture. At high energy scale, we consider Higgs inflation driven by an admixture of standard model and triplet Higgs fields, both coupled non-minimally to gravity. At intermediate and low energies we investigate vector like fermion doublet DM candidates with a charge asymmetry in the dark sector, which is generated by the same mechanism that provides the baryon asymmetry, namely baryogenesis-via-leptogenesis induced by the decay of scalar triplets. At the same time the model gives rise to neutrino masses in the ballpark of oscillation experiments via type-II seesaw. We then apply Bayesian statistics to infer the model parameters giving rise to the observed baryon asymmetry and DM density, compatibly with inflationary and DM direct detection constraints, updated with the CRESST-II excess, the new XENON100 data release and KIMS exclusion limit.