In an f(R, L_m) gravity model constrained by distance modulus data via chi-squared and MCMC, the authors report earlier nonlinear structure formation and higher matter-radiation equality redshift than Lambda CDM, with matching recombination redshift.
FRW Cosmology in F(R,T) gravity
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abstract
In this paper, we consider a theory of gravity with a metric-dependent torsion namely the $F(R,T)$ gravity, where $R$ is the curvature scalar and $T$ is the torsion scalar. We study a geometric root of such theory. In particular we give the derivation of the model from the geometrical point of view. Then we present the more general form of $F(R,T)$ gravity with two arbitrary functions and give some of its particular cases. In particular, the usual $F(R)$ and $F(T)$ gravity theories are the particular cases of the $F(R,T)$ gravity. In the cosmological context, we find that our new gravitational theory can describes the accelerated expansion of the universe.
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Comparative Study of Early-Universe Epochs in an $f(R,L_m)$ Gravity Model with Effective Curvature--Matter Interaction and $\Lambda$CDM Cosmology
In an f(R, L_m) gravity model constrained by distance modulus data via chi-squared and MCMC, the authors report earlier nonlinear structure formation and higher matter-radiation equality redshift than Lambda CDM, with matching recombination redshift.