Unitarity of higher derivative spin-3 models

The fourth order in derivatives New Massive Gravity model NMG, describes a massive spin-2 particle in D=2+1. At the linearized level a proof of unitarity necessarily implies that the generalization to higher dimensions includes non-unitary massless spin-2 modes. The linearized version of NMG is dual...

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Bibliographic Details
Published in:Annals of physics 2020-03, Vol.414, p.168076, Article 168076
Main Authors: Mendonça, E.L., Schimidt Bittencourt, R.
Format: Article
Language:English
Subjects:
formula omitted
Higher-derivative
Singh–Hagen
Spin-3
Unitarity
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Summary:The fourth order in derivatives New Massive Gravity model NMG, describes a massive spin-2 particle in D=2+1. At the linearized level a proof of unitarity necessarily implies that the generalization to higher dimensions includes non-unitary massless spin-2 modes. The linearized version of NMG is dual to the Fierz-Pauli model FP. Here we examine the unitarity of higher derivative spin-3 models, analogous to the NMG, dual to the Singh-Hagen model SH. We find that the same kind of restriction on the dimension of the space also happens in this case, and the models are physical only in D=2+1.
ISSN:0003-4916
1096-035X
DOI:10.1016/j.aop.2020.168076