A model for inflaton induced baryogenesis and its phenomenological consequences

TL;DR

This paper proposes a new inflationary baryogenesis model where baryon numbers are generated during inflation through inflaton dynamics and baryon-violating interactions, with potential observable cosmological signals.

Contribution

It introduces a novel inflation-based baryogenesis mechanism involving symmetry restoration and phase transitions, linking baryon asymmetry to cosmological collider and gravitational wave signals.

Findings

Baryon numbers can be generated and preserved during inflation.

The mechanism predicts observable gravitational wave signals.

It provides a testable link between baryogenesis and cosmological observations.

Abstract

In this study, we introduce a novel approach aimed at addressing the longstanding baryon-anti-baryon asymmetry conundrum. Our proposed mechanism suggests that baryon numbers were generated during the inflationary epoch through the dynamics of the inflaton field coupled with an explicit baryon number violating interaction. Notably, during inflation, it is possible to halt the baryon number generation process via a symmetry restoration phase transition. We elucidate that prior to this phase transition, baryon numbers could be synthesized and preserved within classical field configurations. Subsequently, following the phase transition, these baryon numbers were liberated as particles. Crucially, we demonstrate that this mechanism of baryon number production is intricately linked with significant cosmological collider signals and gravitational wave (GW) signals, offering a compelling framework to explore the origins of the universe's matter-antimatter asymmetry.