Constraining f (T) teleparallel gravity by big bang nucleosynthesis f (T) cosmology and BBN

We use Big Bang Nucleosynthesis (BBN) observational data on the primordial abundance of light elements 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 obtained using late-time cosmological data. For the exponential and the square-root exponential models, we show that for reliable regions of parameters space they always satisfy the BBN bounds. We conclude that viable f (T) models can successfully satisfy the BBN constraints.