Stability of Massive Cosmological Gravitons

Details Stability of Massive Cosmological Gravitons Stability of Massive Cosmological Gravitons

2001-03-29

arxiv.org/abs/hep-th/0103255v2

Phys.Lett.B508:347-353,2001

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, LaTeX, version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00523-8

We analyze the physics of massive spin 2 fields in (A)dS backgrounds and exhibit that: The theory is stable only for masses m^2 >= 2\Lambda/3, where the conserved energy associated with the background timelike Killing vector is positive, while the instability for m^2<2\Lambda/3 is traceable to the helicity 0 energy. The stable, unitary, partially massless theory at m^2=2\Lambda/3 describes 4 propagating degrees of freedom, corresponding to helicities (+/-2,+/-1) but contains no 0 helicity excitation.

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