Gravitational Baryogenesis in Running Vacuum models

Abstract

We study the gravitational baryogenesis mechanism for generating baryon asymmetry in the context of running vacuum models. Regardless if these models can produce a viable cosmological evolution, we demonstrate that they produce a non-zero baryon-to-entropy ratio even if the universe is filled with conformal matter. This is a sound difference between the running vacuum gravitational baryogenesis and the Einstein-Hilbert one, since in the latter case, the predicted baryon-to-entropy ratio is zero. We consider two well known and most used running vacuum models and show that the resulting baryon-to-entropy ratio is compatible with the observational data. Moreover, we also show that the mechanism of gravitational baryogenesis may constrain the running vacuum models.

9 pages, IJMPA Accepted

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Cited by in corpus (16)

• $f(R,T)$ models applied to Baryogenesis
• Dynamics in Varying vacuum Finsler-Randers Cosmology
• Constraining $f(T,\mathcal{T})$ Gravity with Gravitational Baryogenesis
• Gravitational baryogenesis models comparison in f(R) Gravity
• Exact solutions, finite time singularities and non-singular universe models from a variety of $\Lambda (t)$ cosmologies
• The Early-time Cosmology with Stiff Era from Modified Gravity
• Analytic solutions in Einstein-aether scalar field cosmology
• Matter-antimatter asymmetry induced by non-linear electrodynamics
• Varying constants driven baryogenesis
• Constraints on running vacuum models with the baryon-to-photon ratio
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• Dynamical analysis and cosmological viability of varying $G$ and $\Lambda$ cosmology
• Qualitative analysis of Einstein-aether models with perfect fluid and scalar fields
• Matter-antimatter asymmetry and other cosmological puzzles via running vacuum cosmologies