Inflation with the right-handed sneutrino revisited

TL;DR

This paper revisits a model where the right-handed sneutrino drives D-term inflation within an extended nuMSSM, showing it can produce inflationary predictions consistent with current observations.

Contribution

It demonstrates that subplanckian right-handed sneutrino-driven inflation in an extended nuMSSM is compatible with observational data.

Findings

Inflationary parameters match observations for subplanckian inflaton values.

The model incorporates non-renormalizable terms controlled by a discrete R-symmetry.

Right-handed sneutrino can serve as a viable inflaton candidate.

Abstract

We consider an extension of nuMSSM with an extra U(1) that realizes D-term inflation driven by the right-handed sneutrino. Non-renormalizable terms in the Kahler potential and the superpotential are considered, the latter controlled by a suitable discrete R-symmetry. We find that, for subplanckian inflaton values, the predictions of inflationary parameters are compatible with observations, establishing the right-handed sneutrino driven inflation as a viable scenario.