Modified gravity with $f(R)=\sqrt{R^2-R_0^2}$

Shant Baghram, Marzieh Farhang, Sohrab Rahvar

Here in this work we propose a modified gravity with the action of $f(R)=\sqrt{R^2-R_0^2}$ instead of Einstein-Hilbert action to describe the late time acceleration of the univ…