Covariant constraints for generic massive gravity and analysis of its characteristics

S. Deser, M. Sandora, A. Waldron, and G. Zahariade Walter Burke Institute for Theoretical Physics, California Institute of Technology, Pasadena, California 91125 USA and Physics Department, Brandeis University, Waltham, Massachusetts 02454, USA CP3-Origins, Center for Cosmology and Particle Physics Phenomenology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark Department of Physics, University of California, Davis, California 95616, USA Department of Mathematics, University of California, Davis, California 95616, USA (Received 15 August 2014; published 26 November 2014)