Light-front higher-spin theories in flat space
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Publication:2971495
DOI10.1088/1751-8121/AA56E7zbMATH Open1370.81154arXiv1609.04655OpenAlexW2521967561WikidataQ60204880 ScholiaQ60204880MaRDI QIDQ2971495
Author name not available (Why is that?)
Publication date: 5 April 2017
Published in: (Search for Journal in Brave)
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.
Full work available at URL: https://arxiv.org/abs/1609.04655
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