Massive graviton as a testable cold-dark-matter candidate.
We construct a consistent model of gravity where the tensor graviton mode is massive, while linearized equations for scalar and vector metric perturbations are not modified. The Friedmann equation acquires an extra dark-energy component leading to accelerated expansion. The mass of the graviton can be as large as approximately (10(15) cm)(-1), being constrained by the pulsar timing measurements. We argue that nonrelativistic gravitational waves can comprise the cold dark matter and may be detected by the future gravitational wave searches.
Dubovsky
S L
SL
Department of Physics, CERN Theory Division, CH-1211 Geneva 23, Switzerland.
Tinyakov
P G
PG
Tkachev
I I
II