Gravity with dynamical torsion: main properties and cosmological consequences

I will talk about the gravity with dynamical torsion. This gravity treats the connection and vierbein as independent dynamical variables, and the connection is capable of propagating due to the terms in the Lagrangian which are quadratic in torsion and curvature. This model found to have a number of remarkable properties which make it particularly interesting as a modification of gravity in the infrared. Considered from the cosmological point of view, this model admits a self-accelerating solution without the explicit cosmological term in the action. In my talk I will introduce the theory, tell about the various properties of the model under consideration, present the self-accelerating solution together with the analysis of the stability of linear perturbations about this solution.