Probing Leptogenesis through Gravitational Waves

TL;DR

This paper suggests that gravitational waves generated during leptogenesis could serve as observable signatures, providing a new way to validate leptogenesis models linked to the Universe's baryon asymmetry.

Contribution

It introduces the concept that gravitational waves from leptogenesis can act as distinctive signatures, offering a novel observational probe for leptogenesis mechanisms.

Findings

Gravitational waves can be produced during leptogenesis in the early Universe.

These gravitational waves carry signatures that can distinguish leptogenesis scenarios.

The proposed signals could help validate leptogenesis models observationally.

Abstract

We propose that a gravitational wave can be generated during leptogenesis in the early Universe which occurs when a heavy right handed neutrino decays out of equilibrium. Such a gravitational wave, as remnant of leptogenesis, is shown to be associated with distinguishing signatures that act as a powerful probe to leptogenesis and its requirements, which otherwise remains difficult to validate despite its success in explaining the baryon asymmetry of the Universe bearing connection to neutrino physics.