Inflatino-less Cosmology

TL;DR

This paper develops simplified supergravity inflationary models using orthogonal nilpotent superfields, eliminating certain particles to streamline cosmological theories of inflation, dark energy, and SUSY breaking.

Contribution

It introduces a novel supergravity framework with orthogonal nilpotent superfields that removes inflatino, sgoldstino, and sinflaton, simplifying cosmological modeling.

Findings

Models contain only inflaton, graviton, and gravitino.

Simplifies the description of inflation and dark energy.

Facilitates unified cosmological theories.

Abstract

We construct inflationary models in the context of supergravity with orthogonal nilpotent superfields [1]. When local supersymmetry is gauge-fixed in the unitary gauge, these models describe theories with only a single real scalar (the inflaton), a graviton and a gravitino. Critically, there is no inflatino, no sgoldstino, and no sinflaton in these models. This dramatically simplifies cosmological models which can simultaneously describe inflation, dark energy and SUSY breaking.