Abstract
We study a modification of the Plebanski action for general relativity, which leads to a modified theory of gravity with 8 degrees of freedom. We show how the action can be recasted as a bimetric theory of gravity, and expanding around a biflat background we identify the 6 extra degrees of freedom with a second, massive graviton and a scalar mode.
- Received 15 July 2010
DOI:https://doi.org/10.1103/PhysRevD.82.064003
© 2010 The American Physical Society