f(R, T) models applied to baryogenesis

Abstract

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.