Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology

Details Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology

2005-04-14

arxiv.org/abs/hep-ph/0504113v3

Phys.Rev. D71 (2005) 123517

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.71.123517

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.

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