Generic slow-roll and non-gaussianity parameters in $f(R)$ theories

Tays Miranda, Celia Escamilla-Rivera, Oliver F. Piattella +1

In this paper we establish \textit{formulae} for the inflationary slow-roll parameters $\epsilon$, $\eta$ and $\zeta$ as functions of the Ricci scalar $R$ for $f(R)$ theories of gravity. As exam…