Observable (?) cosmological signatures of superstrings in pre-big bang models of inflation

TL;DR

This paper explores how different superstring models could leave detectable imprints on early universe relics, potentially allowing us to distinguish between heterotic and Type I superstrings through cosmic magnetic fields and gravitational waves.

Contribution

It proposes a method to differentiate superstring models by analyzing observable cosmological signatures in the pre-big bang scenario.

Findings

Potential to discriminate between heterotic and Type I superstrings.

Identification of observable signatures in cosmic magnetic fields.

Correlation with primordial gravitational-wave backgrounds.

Abstract

The different couplings of the dilaton to the U(1) gauge field of heterotic and Type I superstrings may leave an imprint on the relics of the very early cosmological evolution. Working in the context of the pre-big bang scenario, we discuss the possibility of discriminating between the two models through cross-correlated observations of cosmic magnetic fields and primordial gravitational-wave backgrounds.