f(R, T) models applied to baryogenesis

Autor: E. H. Baffou, M. J. S. Houndjo, D. A. Kanfon, I. G. Salako
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-6 (2019)
Druh dokumentu: article
ISSN: 1434-6044
1434-6052
DOI: 10.1140/epjc/s10052-019-6559-0
Popis: Abstract 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, $$f(R,T) = R +\alpha T + \beta T^2$$ f(R,T)=R+αT+βT2 and $$f(R,T) = R+ \mu R^2 + \lambda T$$ f(R,T)=R+μR2+λT , 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.
Databáze: Directory of Open Access Journals
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