vbid/9783319189352

Description

This�work�is a detailed study of both the theoretical and phenomenological consequences of a massive graviton,�within the ghost-free theory of massive gravity, the de Rham-Gabadadze-Tolley (dRGT) theory. Its aim is to�test the physical viability of the theory.�It begins by putting�constraints on the parameters of the theory in the decoupling limit based on purely theoretical grounds, like classical stability in the cosmological evolution of self-accelerating and degravitating solutions.�The author then�constructs a proxy theory to massive gravity from the decoupling limit resulting in non-minimally coupled scalar-tensor interactions as an example of a subclass of Horndeski theories. Lastly,�she addresses the natural question of whether the parameters�introduced in the dRGT theory are subject to strong renormalization by quantum loops and shows�how the non-renormalization theorem protects the graviton mass from quantum corrections. Beyond the decoupling limit the quantum corrections are�found to be�proportional to the graviton mass, proving its technical naturalness.Typham this is the title: Theoretical and Observational Consistency of Massive Gravity