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Light-Front Higher-Spin Theories in Flat Space | | Dmitry Ponomarev
; E.D. Skvortsov
; | | Date: |
15 Sep 2016 | | 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. | | Source: | arXiv, 1609.4655 | | Services: | Forum | Review | PDF | Favorites | |
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