The concept of torsion in geometry, although known for a long time, has not gained
considerable attention from the physics community until relatively recently, due to its diverse …

Several aspects of torsion in string-inspired cosmologies are reviewed. In particular, its
connection with fundamental, string-model independent, axion fields associated with the …

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 …

The action of loop quantum gravity includes the Holst term and/or the Nieh–Yan term in
addition to the Ricci scalar. These terms are expected to couple nonminimally to the Higgs …

We study scalar, fermionic and gauge fields coupled nonminimally to gravity in the Einstein-
Cartan formulation. We construct a wide class of models with nondynamical torsion whose …

A bstract We study gravity coupled to scalar and fermion fields in the Einstein-Cartan
framework. We discuss the most general form of the action that contains terms of mass …

We show how Einstein-Cartan gravity can accommodate both global scale and local scale
(Weyl) invariance. To this end, we construct a wide class of models with nonpropagating …

We analyze the cosmological implementation of Palatini f (R) theories, constructed with a
Nieh–Yan term and solved with respect to the torsion. We consider the relevant case of the …

We study a metric-affine gravitational theory given by the Einstein–Hilbert (EH) action plus a
parity violating contribution (which we will refer to as the Hojman term, also known as Holst …