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Journal Article

Metric- and frame-like higher-spin gauge theories in three dimensions

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Fredenhagen,  Stefan
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Kessel,  Pan
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1408.2712.pdf
(Preprint), 295KB

JoPA_48_3_035402.pdf
(Preprint), 423KB

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Citation

Fredenhagen, S., & Kessel, P. (2015). Metric- and frame-like higher-spin gauge theories in three dimensions. Journal of Physics A, 48(3): 035402. doi:10.1088/1751-8113/48/3/035402.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0023-CCE3-F
Abstract
We study the relation between the frame-like and metric-like formulation of higher-spin gauge theories in three space-time dimensions. We concentrate on the theory that is described by an SL(3) x SL(3) Chern-Simons theory in the frame-like formulation. The metric-like theory is obtained by eliminating the generalised spin connection by its equation of motion, and by expressing everything in terms of the metric and a spin-3 Fronsdal field. We give an exact map between fields and gauge parameters in both formulations. To work out the gauge transformations explicitly in terms of metric-like variables, we have to make a perturbative expansion in the spin-3 field. We describe an algorithm how to do this systematically, and we work out the gauge transformations to cubic order in the spin-3 field. We use these results to determine the gauge algebra to this order, and explain why the commutator of two spin-3 transformations only closes on-shell.