Theoretical and Observational Aspecs in Metric-Affine Gravity: A field theoretic perspective

Understand

In this PhD thesis we deal with several theoretical and phenomenological apsects of metric-affine theories of gravity.

• Concretely, we first give a broad introduction to the necessary tools to understand the framework and elaborate on some subtleties of the minimal coupling prescription between geometry and matter in presence of torsion and nonmetricity.
• Then we dedicate the central part of the thesis to study the structure of Ricci Based gravity (RBG) theories, which will be of later use to understand generic properties of metric-affine theories.
• We begin by analysing the structure of the RBG field equations and nontrivial aspects of their solution space.