Cosmic Acceleration and Growth of Structure in Massive Gravity

Understand

We introduce a cosmological model in the framework of Generalised Massive Gravity.

• This theory is an extension of non-linear massive gravity with a broken translation symmetry in the St\"uckelberg space.
• In a recent work, we showed the existence of cosmological solutions stable against linear perturbations.
• In the present paper, we build up on the previous result and study the evolution of the background solutions and the linear perturbations.