Lorentz and diffeomorphism violations in linearized gravity

Lorentz and diffeomorphism violations are studied in linearized gravity using effective field theory. A classification of all gauge-invariant and gauge-violating terms is given. The exact covariant dispersion relation for gravitational modes involving operators of arbitrary mass dimension is constructed, and various special limits are discussed. (c) 2018 The Author(s). Published by Elsevier B.V.