Gravitational Baryogenesis after Anisotropic Inflation

Abstract

The gravitational baryogensis may not generate a sufficient baryon asymmetry in the standard thermal history of the Universe when we take into account the gravitino problem. Hence it has been suggested that anisotropy of the Universe can enhance the generation of the baryon asymmetry through the increase of the time change of the Ricci scalar curvature. We study the gravitational baryogenesis in the presence of anisotropy, which is produced at the end of an anisotropic inflation. Although we confirm that the generated baryon asymmetry is enhanced compared with the original isotropic cosmological model, taking into account the constraint on the anisotropy by the recent CMB observations, we find that it is still difficult to obtain the observed baryon asymmetry only through the gravitational baryogenesis without suffering from the gravitino problem.

arXiv comment16 pages, 8 figures. Accepted for publication in Physical Review D

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Cited by in corpus (14)

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• Semi-analytic techniques for calculating bubble wall profiles
• Gravitational baryogenesis models comparison in f(R) Gravity
• Constraining the Lorentz-Violating Bumblebee Vector Field with Big Bang Nucleosynthesis and Gravitational Baryogenesis
• Intrinsic problems of gravitational baryogenesis
• Anisotropic power-law inflation for a conformal-violating Maxwell model
• Higher-order generalized uncertainty principle applied to gravitational baryogenesis
• Instability of gravitational baryogenesis with fermions
• Thermal leptogenesis in anisotropic cosmology
• Varying constants driven baryogenesis
• Expanding, shearing and accelerating isotropic plane symmetric universe with conformal Kasner geometry
• Gravitational baryogenesis in $F(R)$ gravity's rainbow
• Matter-antimatter asymmetry in generalized coupling theories
• Gravitational baryogenesis beyond the spectator approximation