TransverseDiff gravity is to scalar-tensor as unimodular gravity is to General Relativity

Juan José López-Villarejo

Transverse Diffeomorphism (TDiff) theories are well-motivated theories of gravity from the quantum perspective, which are based upon a gauge symmetry principle. The aim of the talk is to firmly establish a correspondence between TransverseDiff and the better-known scalar-tensor gravity -- in its more general form --, a relation which is completely analogous to that between unimodular gravity and General Relativity. We comment on the observational aspects.