Baryogenesis by Quantum Gravity

TL;DR

This paper proposes a new baryogenesis mechanism based on a phase transition in quantum gravity, where gravitational excitations decay into matter, explaining matter-antimatter asymmetry.

Contribution

It introduces a novel quantum gravity-based baryogenesis mechanism involving a phase transition and unparticle physics, not previously explored.

Findings

Gravitational excitations with ~10^17 GeV mass are generated at the transition.

Decay of these excitations can produce matter-antimatter asymmetry.

Effective interactions via axial anomalies can explain matter asymmetry.

Abstract

A novel mechanism of baryogenesis is proposed on the basis of the phase transition from the conformal invariant space-time to the Einstein space-time in quantum gravity. Strong-coupling gravitational excitations with dynamical mass about 10^17 GeV are generated at the transition. They eventually decay into ordinary matters. As a realization of unparticle physics we show that the low energy effective interactions between the gravitational potential describing the excitation and the non-conserving matter currents by the axial anomalies can explain matter asymmetry out of thermal equilibrium.