Description
Metric affine gravity (MAG) represents an extension of general relativity (GR) in which the metric and affine connection are independent geometrical variables. This leads to two, in addition to curvature, tensors describing the geometry of spacetime, torsion and nonmetricity. And a new tensor describing its matter content together with the stress energy tensor, the hypermomentum tensor. I will review the main features of metric affine gravity and show the corresponding modified Friedmann equations. And I will present how MAG changes the GR predictions in the study fo cosmology and of inflation.