Linearized transverse diffeomorphism invariant spin-2 theories via gauge invariants
Abstract
Abstract We analyze the particle spectrum of a second-order (in derivatives) theory based on a rank-2 tensor field with both symmetric and antisymmetric components. By demanding the existence of a propagating massless spin-2 particle and invariance under linearized transverse diffeomorphisms, we derive a new class of stable models with two massless scalars and a single massless spin-2 particle. A natural nonlinear completion is proposed in terms of a dynamical metric field. The identification of the spectrum is carried out using a fully Lagrangian, gauge-invariant approach which makes use of Bardeen variables in a constructive manner. The approach significantly reduces the number of steps in the spectrum determination in some cases.
Fields of Study & Subjects
Noncommutative and Quantum Gravity Theories
Quantum and Classical Electrodynamics
Black Holes and Theoretical Physics
Publication details
- Journal / source
- Classical and Quantum Gravity
- Volume
- 43
- Issue
- 8
- Pages
- 085006–085006
- Publication date
- 8 April 2026
- Language
- EN