Can one cure the nommitarity of three-dimensional quadratic gravity using a topological Chern-Simons term?
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Data
2004-02-01
Autores
Accioly, A.
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Elsevier B.V.
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Quadratic gravity in (2+1)D is nonunitarity at the tree level. When a topological Chern-Simons term is added to this theory, the harmless massive scalar mode of the former gives rise to a troublesome massive spin-0 ghost, while the massive spin-2 ghost is replaced by two massive physical particles both of spin-2. Therefore, unlike what it is claimed in the literature, quadratic Chern-Simons gravity in (2+1)D is nonunitary at the tree level.
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Nuclear Physics B-proceedings Supplements. Amsterdam: Elsevier B.V., v. 127, p. 100-104, 2004.