• Open Access

Interactions of Multiple Spin-2 Fields beyond Pairwise Couplings

S. F. Hassan and Angnis Schmidt-May
Phys. Rev. Lett. 122, 251101 – Published 26 June 2019

Abstract

Thus far, all known ghost-free interactions of multiple spin-2 fields have involved at most pairwise couplings of the fields, which are direct generalizations of bimetric interactions. We present a class of spin-2 theories with genuine multifield interactions and explicitly demonstrate the absence of ghost instabilities. The construction involves integrating out a nondynamical field in a theory of spin-2 fields with only pairwise ghost-free interactions. The new multivierbein interactions generated are not always expressible in terms of the associated metrics.

  • Received 21 July 2018
  • Revised 16 April 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.251101

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & AstrophysicsParticles & Fields

Authors & Affiliations

S. F. Hassan1 and Angnis Schmidt-May2

  • 1Department of Physics and The Oskar Klein Centre, Stockholm University, AlbaNova University Centre, SE-106 91 Stockholm, Sweden
  • 2Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 Munich, Germany

Article Text

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Issue

Vol. 122, Iss. 25 — 28 June 2019

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