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- W2193016281 abstract "We give a detailed analysis of the particle spectrum and the perturbative unitarity of the recently introduced Weyl-invariant version of the new massive gravity in 2+1 dimensions. By computing the action up to second order in the fluctuations of the metric, the gauge and the scalar fields around the anti-de Sitter (AdS) and flat vacua, we find that the theory describes unitary (tachyon and ghost-free) massive spin-2, massive (or massless) spin-1 and massless spin-0 excitations for certain ranges of the dimensionless parameters. The theory is not unitary in de Sitter space. Scale invariance is either broken spontaneously (in AdS background) or radiatively (in flat background) and hence the masses of the particles are generated either spontaneously or at the second loop order." @default.
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- W2193016281 date "2012-03-06" @default.
- W2193016281 modified "2023-10-18" @default.
- W2193016281 title "Unitarity of Weyl-invariant new massive gravity and generation of graviton mass via symmetry breaking" @default.
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- W2193016281 doi "https://doi.org/10.1103/physrevd.85.064008" @default.
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