Light-Front Higher-Spin Theories in Flat Space
arXiv:1609.04655 · doi:10.1088/1751-8121/aa56e7
Abstract
We revisit the problem of interactions of higher-spin fields in flat space. We argue that all no-go theorems can be avoided by the light-cone approach, which results in more interaction vertices as compared to the usual covariant approaches. It is stressed that there exist two-derivative gravitational couplings of higher-spin fields. We show that some reincarnation of the equivalence principle still holds for higher-spin fields - the strength of gravitational interaction does not depend on spin. Moreover, it follows from the results by Metsaev that there exists a complete chiral higher-spin theory in four dimensions. We give a simple derivation of this theory and show that the four-point scattering amplitude vanishes. Also, we reconstruct the quartic vertex of the scalar field in the unitary higher-spin theory, which turns out to be perturbatively local.
26+Appendices=37 pages; one ref added
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Cited by in corpus (6)
- Chiral Higher Spin Theories and Self-Duality
- Elementary particles with continuous spin
- A Note on (Non)-Locality in Holographic Higher Spin Theories
- Off-Shell Spinor-Helicity Amplitudes from Light-Cone Deformation Procedure
- Cubic interaction vertices for continuous-spin fields and arbitrary spin massive fields
- Aspects of Higher Spin Theories, Conformal Field Theories and Holography