Abstract We generalize the Chern-Simons modified gravity to the metric-affine case and
impose projective invariance by supplementing the Pontryagin density with homothetic …

General relativity (GR) exists in different formulations, which are equivalent in pure gravity.
Once matter is included, however, observable predictions generically depend on the version …

General relativity (GR) exists in different formulations. They are equivalent in pure gravity but
generically lead to distinct predictions once matter is included. After a brief overview of …

Since the discovery of the accelerated expansion of the present universe, significant
theoretical developments have been made in the area of modified gravity. In the meantime …

In this work we describe metric-affine theories anew by making a change of field variables. A
series of equivalent frameworks is presented and identifications are worked out in detail …

In this work we study the stability of the four vector irreducible pieces of the torsion and the
nonmetricity tensors in the general quadratic metric-affine Lagrangian in 4 dimensions. The …

We consider the most general quadratic metric-affine gravity setup in the presence of
generic matter sources with non-vanishing hypermomentum. The gravitational action …

We extend the results of antecedent literature on quadratic Metric-Affine Gravity by studying
a new quadratic gravity action in vacuum which, besides the usual (non-Riemannian) …

In this paper, cosmological aspects of metric‐affine f (R) f(R) gravity with hyperfluid are
studied. The equations of motion of the theory are obtained by varying the action with …

We consider a generic Metric-Affine Cosmological setup and classify some particularly
interesting specific cases of Perfect Hyperfluids. In particular, we present the form of …