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Viability of Big Bang Nucleosynthesis in Gravity
Kajal Phukan, Rajdeep Mazumdar, Kalyan Malakar +1
We examine the viability of Big Bang Nucleosynthesis (BBN) constraints in gravity, where the gravitational Lagrangian is an arbitrary function of the the Ricci scalar $R…
Cosmological Realization of Baryon Asymmetry in f(R, G_{μν}T^{μν}) Gravity
Kalyan Malakar, Rajdeep Mazumdar, Kalyan Bhuyan
This work investigates the mechanism of gravitational baryogenesis (GB) under the formalism of f(R, G_{μν}T^{μν}) gravity, where R denotes the Ricci scalar, G_{μν} is the Einstein…
From Big Bang Nucleosynthesis to Late-Time Acceleration in Gravity
Rajdeep Mazumdar, Kalyan Malakar, Kalyan Bhuyan
We perform a comprehensive investigation of the early-to-late time cosmic evolution within the framework of gravity, characterized by a non-minimal coupling between non-…
Viability of Big Bang Nucleosynthesis in Some Generalized Horizon Entropies
Kajal Phukan, Rajdeep Mazumdar, Kalyan Malakar +1
In this work, we investigate the viability of some cosmological models derived from generalized horizon entropies, using Big Bang Nucleosynthesis (BBN) constraints. By analyzing th…
Exploring Rényi Entropic Cosmology Constrained by DESI DR2 BAO and Complementary Late-Time Observations
Rajdeep Mazumdar, Kalyan Malakar, Kalyan Bhuyan
We investigate the late-time cosmological viability of Rényi entropic cosmology (REC) by confronting its modified Friedmann dynamics with DESI DR2 BAO, cosmic chronometers, gravita…
Dynamics of Late time cosmology in Gravity with Constraints from DESI DR2 BAO Data
Rajdeep Mazumdar, Kalyan Malakar, Kalyan Bhuyan
We investigate late-time cosmology in the context of modified gravity, considering a non-linear model where, , , , and are some…