Thermal leptogenesis in anisotropic cosmology

Thermal leptogenesis in anisotropic cosmology

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-...

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Veröffentlicht in:arXiv.org 2023-12
1. Verfasser: Dehpour, Mehran
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Sprache:eng
Schlagworte:
Anisotropy
Baryons
Big bang cosmology
Cosmology
Nuclear fusion
Nuclei (nuclear physics)
Physics - Cosmology and Nongalactic Astrophysics
Physics - High Energy Physics - Phenomenology
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description 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.
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subjects Anisotropy
Baryons
Big bang cosmology
Cosmology
Nuclear fusion
Nuclei (nuclear physics)
Physics - Cosmology and Nongalactic Astrophysics
Physics - High Energy Physics - Phenomenology
title Thermal leptogenesis in anisotropic cosmology
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