Gravity Waves from Tachyonic Preheating after Hybrid Inflation

TL;DR

This paper analyzes the production of gravitational waves during preheating in hybrid inflation models, showing that certain parameter regimes could produce detectable signals in future gravitational wave detectors.

Contribution

It provides analytical and numerical analysis of gravitational wave spectra from hybrid inflation preheating, highlighting parameter dependencies and potential observability.

Findings

Gravitational wave spectra depend on potential parameters.

Large regions of parameter space produce potentially observable signals.

Detection may require very small coupling constants.

Abstract

We study the stochastic background of gravitational waves produced from preheating in hybrid inflation models. We investigate different dynamical regimes of preheating in these models and we compute the resulting gravity wave spectra using analytical estimates and numerical simulations. We discuss the dependence of the gravity wave frequencies and amplitudes on the various potential parameters. We find that large regions of the parameter space leads to gravity waves that may be observable in upcoming interferometric experiments, including Advanced LIGO, but this generally requires very small coupling constants.