Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology

Abstract

The mechanism of gravitational baryogenesis, based on the CPT-violating gravitational interaction between the derivative of the Ricci scalar curvature and the baryon-number current, is investigated in the context of the Gauss-Bonnet braneworld cosmology. We study the constraints on the fundamental five-dimensional gravity scale, the effective scale of B-violation and the decoupling temperature, for the above mechanism to generate an acceptable baryon asymmetry during the radiation-dominated era. The scenario of gravitational leptogenesis, where the lepton-number violating interactions are associated with the neutrino mass seesaw operator, is also considered.

8 pages, 3 figures, final version to appear in Phys. Rev. D

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• Patch dualities and remarks on nonstandard cosmologies
• Consistency relations and degeneracies in (non)commutative patch inflation

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