Baryogenesis and Low Energy CP Violation

TL;DR

This paper explores the connection between low-energy CP violation observable in experiments and the mechanisms of baryogenesis, focusing on electroweak baryogenesis and leptogenesis, and how they can be constrained by data.

Contribution

It demonstrates how specific baryogenesis scenarios can be linked to measurable CP violating phases in the CKM matrix, providing testable predictions.

Findings

Constraints on baryogenesis from experimental data

Relation between CKM CP phase and baryogenesis CP phase

Potential for future experimental tests

Abstract

CP violation is a crucial component in the creation of the matter - anti matter asymmetry of the universe. An important open question is whether the CP violating phenomena observeable in terrestrial experiments have any relation with those responsible for baryogenesis. We discuss two mechanisms of baryogenesis where this question can be meaningfully posed: ``electroweak baryogenesis'' and ``baryogenesis via leptogenesis''. We show how these scenarios can be constrained by existing and forthcoming experimental data. We present a specific example of both these scenarios where the CP violating phase in the Cabbibo Kobayashi Maskawa matrix is related in a calculable way to the CP violating phase responsible for baryogenesis.