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Keyword: dark sector ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   MCMC constraints on dark sector dynamics in f(R,Lm,T) modified gravity

   Myrzakulov, Alfedeel, Koussour, Muminov, Ali and Rayimbaev · International Journal of Geometric Methods in Modern Physics · 2025

   The paper studies an f(R,Lm,T) modified gravity model, fits it to Hubble and supernova data, and reports that it reproduces a shift from decelerating to accelerating expansion.

   Unchecked2 claims
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   1. UncheckedAn MCMC fit to Hubble and Type Ia supernova data gives tightly constrained parameters for this modified gravity model, with the joint dataset reducing uncertainties.“The results of our MCMC analysis, based on Hubble and SNe Ia datasets, yield tightly constrained model parameters ([Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text]), with the joint dataset reducing uncertainties.”
   2. UncheckedIn this modified-gravity model, fitted to data, the universe shifts from slowing to speeding up and later settles into de Sitter-like expansion.“The model successfully captures the evolution of the Hubble parameter, deceleration parameter, energy density, and the [Formula: see text] diagnostic, showing a transition from deceleration to acceleration and an eventual de Sitterlike expansion at [Formula: see text].”