Lorentz and Diffeomorphism Violations in Linearized Gravity
Alan Kostelecky, Matthew Mewes
TL;DR
This paper investigates potential violations of Lorentz and diffeomorphism symmetries in linearized gravity, classifies related terms, and derives a covariant dispersion relation for gravitational modes.
Contribution
It provides a comprehensive classification of gauge-invariant and violating terms and constructs an exact covariant dispersion relation for gravitational modes with arbitrary mass dimension.
Findings
Classification of all gauge-invariant and violating terms
Derivation of the exact covariant dispersion relation
Discussion of special limits of the dispersion relation
Abstract
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.
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