Gravitational Waves as a Probe of the Gravitino Mass

TL;DR

This paper proposes that gravitational waves generated from domain wall annihilation in the early universe can be used to measure the gravitino mass, linking cosmological observations to particle physics parameters.

Contribution

It introduces a novel method to probe the gravitino mass through gravitational wave signals resulting from domain wall dynamics caused by R symmetry breaking.

Findings

Gravitational waves from domain wall annihilation can encode information about the gravitino mass.

The model connects superpotential constants to observable gravitational wave spectra.

Potential for future gravitational wave detectors to measure supersymmetric particle properties.

Abstract

If gaugino condensations occur in the early universe, domain walls are produced as a result of the spontaneous breaking of a discrete R symmetry. Those domain walls eventually annihilate with one another, producing the gravitational waves. We show that the gravitational waves can be a probe for measuring the gravitino mass, if the constant term in the superpotential is the relevant source of the discrete R symmetry breaking.