Inflation, Dark Energy and Dark Matter in Supergravity

TL;DR

This paper explores how supergravity can theoretically model the universe's inflation, dark energy, and dark matter, aligning with observations through specific models involving supersymmetry breaking.

Contribution

It presents viable supergravity models for the Dark Side of the Universe, integrating inflation, dark energy, and dark matter within a consistent theoretical framework.

Findings

Supergravity models can describe inflation, dark energy, and dark matter.

The Starobinsky model is used for inflation.

The lightest supersymmetric particle is identified as dark matter.

Abstract

The Dark Side of the Universe, which includes the cosmological inflation in the early Universe, the current dark energy and dark matter, can be theoretically described by supergravity, though it is non-trivial. We recall the arguments pro and contra supersymmetry and supergravity, and define the viable supergravity models describing the Dark Side of the Universe in agreement with all current observations. Our approach to inflation is based on the Starobinsky model, the dark energy is identified with the positive cosmological constant (de Sitter vacuum), and the dark matter particle is given by the lightest supersymmetric particle identified with the supermassive gravitino. The key role is played by spontaneous supersymmetry breaking.