Reheating after inflation by supersymmetry breaking

We study reheating after the end of inflation in models where the inflaton is the superpartner of goldstino and is charged under a gauged U(1) R-symmetry. We consider two classes of models - one is small field characterized by an almost flat Kahler space, and the other large field characterized by a hyperbolic Kahler space SU(1, 1)/U (1), while in both cases the inflaton superpotential is linear due to the R-symmetry. The inflationary observables of our models fit within 2 sigma CMB values. Upon coupling the inflaton sector to the (supersymmetric) Standard Model, we compute the MSSM parameters, mass spectrum, and decay modes of the inflaton, with the resulting reheating temperature around 10(8) GeV. We also find that both models can accommodate super-heavy LSP dark matter, depending on the parameter choice.

Automated summary

The study investigates reheating after the end of inflation in models with gauged U(1) R-symmetry where the inflaton is the superpartner of goldstino. Two classes of models are considered, with the inflaton superpotential being linear due to the R-symmetry in both cases. The inflationary observables of the models fit within 2 sigma CMB values, and coupling the inflaton sector to the Standard Model results in a reheating temperature around 10^8 GeV, with the potential for accommodating super-heavy LSP dark matter in both models depending on parameter choice.