Massive Vector Chern-Simons Gravity
C. Aragone, P. J. Arias, A. Khoudeir
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.
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