Massive vector Chern-Simons gravity

Abstract

Massive vector Chern-Simons gravity (Khoudeir, Adel; Aragone, Carlos; Pío José, Arias)

Abstract

We present a second order gravity action which consists of ordinary Einstein action augmented by a first-order, vector like, Chern-Simons quasi topological term.This theory is ghost-free and propagates a pure spin-2 mode. It is diffeomorphism invariant, although its local Lorentz invariance has been spontaneously broken.