On Unitarity of Massive Gravity in Three Dimensions

Details On Unitarity of Massive Gravity in Three Dimensions On Unitarity of Massive Gravity in Three Dimensions

2009-02-20

arxiv.org/abs/0902.3531v5

Prog.Theor.Phys.121:1389-1397,2009

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, references added

Scientific paper

10.1143/PTP.121.1389

We examine a unitarity of a particular higher-derivative extension of general relativity in three space-time dimensions, which has been recently shown to be equivalent to the Pauli-Fierz massive gravity at the linearized approximation level, and explore a possibility of generalizing the model to higher space-time dimensions. We find that the model in three dimensions is indeed unitary in the tree-level, but the corresponding model in higher dimensions is not so due to the appearance of non-unitary massless spin-2 modes.

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