Big Bang Nucleosynthesis constraints on the Energy-Momentum Squared Gravity: The $\mathbb{T}^{2}$ model
Cosmology and Nongalactic Astrophysics
2025-02-26 v2 General Relativity and Quantum Cosmology
Nuclear Theory
Abstract
Scale-independent energy-momentum squared gravity (EMSG) allows different gravitational couplings for different types of sources and has been proven to have interesting implications in cosmology. In this paper, the Big Bang Nucleosynthesis (BBN) formalism and the latest observational constraints on nuclear abundances are being used to put bounds on this class of modified gravity models. Using the tight constraint from BBN on the correction term in the Friedmann equation in EMSG scenario, we report the allowed deviation from the standard cosmic expansion rate.
Keywords
Cite
@article{arxiv.2402.01210,
title = {Big Bang Nucleosynthesis constraints on the Energy-Momentum Squared Gravity: The $\mathbb{T}^{2}$ model},
author = {Dukjae Jang and Mayukh R. Gangopadhyay and Myung-Ki Cheoun and Toshitaka Kajino and M. Sami},
journal= {arXiv preprint arXiv:2402.01210},
year = {2025}
}
Comments
7 pages, 4 figures, matches PRD published version