On massive gravitons in 2+1 dimensions

Details On massive gravitons in 2+1 dimensions On massive gravitons in 2+1 dimensions

2009-12-15

arxiv.org/abs/0912.2944v2

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, to appear in the proceedings of the Spanish Relativity Meeting ERE2009, Bilbao; minor changes, reference added

Scientific paper

The Fierz-Pauli (FP) free field theory for massive spin 2 particles can be extended, in a spacetime of (1+2) dimensions (3D), to a generally covariant parity-preserving interacting field theory, in at least two ways. One is "new massive gravity" (NMG), with an action that involves curvature-squared terms. Another is 3D "bigravity", which involves non-linear couplings of the FP tensor field to 3D Einstein-Hilbert gravity. We review the proof of the linearized equivalence of both "massive 3D gravity" theories to FP theory, and we comment on their similarities and differences.

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