Non-Minimal Chaotic Inflation, Peccei-Quinn Phase Transition and non-Thermal Leptogenesis

TL;DR

This paper proposes an extension of the MSSM with non-minimal chaotic inflation and a Peccei-Quinn phase transition, addressing key problems like the strong CP issue, mu problem, and baryogenesis via non-thermal leptogenesis, consistent with observational data.

Contribution

It introduces a novel inflationary model coupled with a Peccei-Quinn transition that simultaneously solves multiple MSSM issues and explains baryogenesis through non-thermal leptogenesis.

Findings

Constrained gravitational coupling strength to 45-2950.

Revealed Dirac neutrino masses between 1 and 10 GeV.

Aligned inflationary and baryogenesis predictions with observational data.

Abstract

We consider a phenomenological extension of the minimal supersymmetric standard model (MSSM) which incorporates non-minimal chaotic inflation, driven by a quadratic potential in conjunction with a linear term in the frame function. Inflation is followed by a Peccei-Quinn phase transition, based on renormalizable superpotential terms, which resolves the strong CP and mu problems of MSSM and provide masses lower than about 10^12 GeV for the right-handed (RH) (s)neutrinos. Baryogenesis occurs via non-thermal leptogenesis, realized by the out-of-equilibrium decay of the RH sneutrinos which are produced by the inflaton's decay. Confronting our scenario with the current observational data on the inflationary observables, the light neutrino masses, the baryon asymmetry of the universe and the gravitino limit on the reheat temperature, we constrain the strength of the gravitational coupling to rather large values (~45-2950) and the Dirac neutrino masses to values between about 1 and 10 GeV.