Stability of Massive Cosmological Gravitons
High Energy Physics - Theory
2008-11-26 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Nuclear Theory
Abstract
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.
Keywords
Cite
@article{arxiv.hep-th/0103255,
title = {Stability of Massive Cosmological Gravitons},
author = {S. Deser and A. Waldron},
journal= {arXiv preprint arXiv:hep-th/0103255},
year = {2008}
}
Comments
13 pages, LaTeX, version to appear in Phys. Lett. B