String-inspired Gauss-Bonnet Gravity Inflation and ACT

S. D. Odintsov, V. K. Oikonomou, Pyotr Tsyba +2

In this article we present a systematic observational verification of the ghost-free string-inspired $f(R,\mathcal{G})$ model, where the Gauss-Bonnet invariant is non-minimally cou…