On Unitarity of Massive Gravity in Three Dimensions
High Energy Physics - Theory
2011-07-18 v5
Abstract
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.
Cite
@article{arxiv.0902.3531,
title = {On Unitarity of Massive Gravity in Three Dimensions},
author = {Masashi Nakasone and Ichiro Oda},
journal= {arXiv preprint arXiv:0902.3531},
year = {2011}
}
Comments
10 pages, references added