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Keyword: matter Lagrangian ×Clear all

3 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Effects of Matter Lagrangian in f(Q,T) Gravity: The Accelerating Cosmological Model

   Bhagat, Fomin and Mishra · SSRN Electronic Journal · 2025

   The authors test a logarithmic f(Q,T) gravity model with two matter Lagrangian choices against supernova and chronometer data, reporting that it reproduces late-time accelerated expansion.

   Unchecked3 claims
   Show 3 claims

   1. Unchecked“We have observed that the deceleration parameter shows a smooth transition from deceleration to acceleration phase and the effective equation of state parameter ($ω$) approaches to $-1$ at late times.”
   2. UncheckedIn this f(Q,T) gravity model, the Om(z) diagnostic falls with redshift and statefinder paths stay near ΛCDM but move into the quintessence region.“The $Om(z)$ diagnostic exhibits a decreasing profile, confirming quintessence-like behavior, and the statefinder analysis demonstrates trajectories that remain near the $Λ$CDM fixed point but deviate into the quintessence region.”
   3. Unchecked“The evolution of the density parameters satisfies the flatness condition, and the predicted age of the Universe lies within $t_0 \sim 13.7-14.3$ Gyr, consistent with CMB and stellar estimates.”