We report the existence of a ghost-and tachyon-free sector in metric affine theories of gravity,
that is invariant under diffeomorphism and a particular Abelian symmetry. In contrast with …

The UV cutoff on a quantum field theory (QFT) can explicitly break or conserve the Poincaré
(translation) symmetry. And the very same cutoff can explicitly break or conserve the gauge …

We classify the metric-affine theories of gravitation, in which the metric and the connections
are treated as independent variables, by use of several constraints on the connections …

We investigate the cosmological aspects of the most general parity preserving Metric-Affine
Gravity theory quadratic in torsion and nonmetricity in the presence of a cosmological …

We motivate a minimal realization of slow-roll k-inflation by incorporating the local conformal
symmetry and the broken global SO (1, 1) symmetry in the metric-affine geometry. With use …

The intriguing choice to treat alternative theories of gravity by means of the Palatini
approach, namely elevating the affine connection to the role of independent variable …

A spacetime interpretation of deformed relativity symmetry groups was recently proposed by
resorting to Finslerian geometries, seen as the outcome of a continuous limit endowed with …

Given a spacetime with nonvanishing torsion, we discuss the equation for the evolution of
the separation vector between infinitesimally close curves in a congruence. We show that …

In the present paper, the 3+ 1 decomposition of the spacetime onto hypersurface (s) is
analyzed and established for theories within the Palatini formalism by considering a general …

It is known that in f (R) theories of gravity with an independent connection which can be both
nonmetric and nonsymmetric, this connection can always be algebraically eliminated in …