Talk by Hamid Afshar

Conformal Chern-Simons gravity

Partial masslessness is a general feature of massive higher spins in (A)dS backgrounds at the linearized level. Considering the case of spin-2 we discuss the gauge symmetry enhancement via partial masslessness. Requiring this gauge symmetry to be present also non-linearly reduces such actions to conformal gravity in three dimensions (Conformal Chern-Simons Gravity). After performing a canonical analysis of this theory and constructing the gauge generators and associated charges, we provide and classify admissible boundary conditions. This classification leads to various physically distinct scenarios of holography. In the most general case the dual CFT contains an additional scalar field with background charge.