The Impact of Particle Production on Gravitational Baryogenesis

Abstract

Baryogenesis driven by curvature effects is investigated by taking into account gravitationally induced particle production in the very early Universe. In our scenario, the baryon asymmetry is generated dynamically during an inflationary epoch powered by ultra-relativistic particles. The adiabatic particle production rate provides both the needed negative pressure to accelerate the radiation dominated Universe and a non-zero chemical potential which distinguishes baryons and anti-baryons thereby producing a baryon asymmetry in agreement with the observed value. Reciprocally, the present day asymmetry may be used to determine the inflationary scale at early times. Successful gravitational baryogenesis is dynamically generated for many different choices of the relevant model parameters.

16 pages revtex, no figures. To be published in PLB

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• Cosmological Particle Production: A Review
• Loop Quantum Cosmology Gravitational Baryogenesis
• The Early-time Cosmology with Stiff Era from Modified Gravity
• Gravitational baryogenesis in non-minimal kinetic coupling model
• Matter-Antimatter Asymmetry Induced by a Running Vacuum Coupling
• Phenomenological modification of horizon temperature
• How cosmological expansion affects communication between distant quantum systems
• Gravitational baryogenesis in $F(R)$ gravity's rainbow