Oscillating cosmic evolution and constraints on big bang nucleosynthesis in the extended Starobinsky model

Jubin Park, Chae-min Yun, Myung-Ki Cheoun +1

We investigate the cosmic evolutions in the extended Starobinsky model (eSM) obtained by adding one $R^{ab}{R}_{ab}$ term to the Starobinsky model. We discuss the possibility of vari…