Massive Gravity: Exorcising the Ghost

Details Massive Gravity: Exorcising the Ghost Massive Gravity: Exorcising the Ghost

2010-10-31

arxiv.org/abs/1011.0183v1

JHEP 1104:004,2011

Physics

High Energy Physics

High Energy Physics - Theory

16 pages

Scientific paper

10.1007/JHEP04(2011)004

We consider Higgs massive gravity [1,2] and investigate whether a nonlinear ghost in this theory can be avoided. We show that although the theory considered in [10,11] is ghost free in the decoupling limit, the ghost nevertheless reappears in the fourth order away from the decoupling limit. We also demonstrate that there is no direct relation between the value of the Vainshtein scale and the existence of nonlinear ghost. We discuss how massive gravity should be modified to avoid the appearance of the ghost.

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