(f(R,T)\) models applied to Baryogenesis

This paper is devoted to the reproduction of the gravitational baryogenesis epoch in the context of \(f(R, T)\) theory of gravity, where \(R\) and \(T\) are respectively the curvature scalar and the trace of the energy-momentum tensor, respectively. It is assumed a minimal coupling between matter an...

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Bibliographic Details
Published in:arXiv.org 2018-08
Main Authors: Baffou, E H, Houndjo, M J S, Kanfon, D A, Salako, I G
Format: Article
Language:English
Subjects:
Astronomical models
Baryons
Cosmology
Curvature
Dark energy
Entropy
Gravitation theory
Tensors
Universe
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Summary:This paper is devoted to the reproduction of the gravitational baryogenesis epoch in the context of \(f(R, T)\) theory of gravity, where \(R\) and \(T\) are respectively the curvature scalar and the trace of the energy-momentum tensor, respectively. It is assumed a minimal coupling between matter and gravity. In particular we consider the following two models, \(f(R,T) = R +\alpha T + \beta T^2\) and \(f(R,T) = R+ \mu R^2 + \lambda T\), with the assumption that the universe is filled by dark energy and perfect fluid where the baryon to entropy ratio during a radiation domination era is non-zero. We constrain the models with the cosmological gravitational baryogenesis scenario, highlighting the appropriate values of model's parameters compatible with the observation data of the baryon-entropy ratio.
ISSN:2331-8422
DOI:10.48550/arxiv.1808.01917