Thermal leptogenesis in anisotropic cosmology

Abstract

There is no evidence that the universe must have been homogeneous and isotropic before the big bang nucleosynthesis. The Bianchi type-I cosmology is the simplest homogeneous but anisotropic cosmology. In this work, we investigate thermal leptogenesis, as a baryogenesis scenario, in the Bianchi type-I cosmology. Our results show that for specific values of the anisotropy, the modified thermal leptogenesis generated more baryon asymmetry than the standard one. In this way, anisotropy can help to achieve low-scale leptogenesis.

arXiv comment16 pages, 5 figures

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Cited by in corpus (5)

• Constraints on an Anisotropic Universe
• Thermal leptogenesis in nonextensive cosmology
• Magnetic Bianchi-I cosmology in the Horndeski theory
• Leptogenesis assisted by scalar decays
• Thermal leptogenesis in the presence of helical hypermagnetic fields