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Constraining f(T) teleparallel gravity by Big Bang Nucleosynthesis
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abstract
We use BBN observational data on primordial abundance of ${}^4He$ to constrain f(T) gravity. The three most studied viable $f(T)$ models, namely the power law, the exponential and the square-root exponential are considered, and the BBN bounds are adopted in order to extract constraints on their free parameters. For the power-law model, we find that the constraints are in agreement with those acquired using late-time cosmological data. For the exponential and the square-root exponential models, we show that for realiable regions of parameters space they always satisfy the BBN bounds. We conclude that viable f(T) models can successfully satisfy the BBN constraints.
Forward citations
Cited by 2 Pith papers
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Baryon asymmetry from higher-order matter contributions in gravity
A T^2-dependent coupling between the derivative of T_mu nu T^mu nu and the baryon current can generate the observed baryon asymmetry in GR and f(R,T^2) gravity, at the cost of fitted parameters.
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The new higher-order generalized uncertainty principle and primordial big bang nucleosynthesis
A higher-order GUP is fitted to BBN abundances, but arithmetic errors invalidate the reported parameter bounds.
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