Tree-level unitarity constraints on the gravitational couplings of higher-spin massive fields

A. Cuccieri, M. Porrati, S. Deser

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We analyze the high-energy behavior of tree-level graviton Compton amplitudes for particles of mass m and arbitrary spin, concentrating on a combination of forward amplitudes that will be unaffected by eventual cross couplings to other, higher spins. We first show that for any spin >2, tree-level unitarity is already violated at energies ∼ mMPl, rather than at the Planck scale MPl, even for mMPl. We then restore unitarity to this amplitude up to MPl by adding nonminimal couplings that depend on the curvature and its derivatives, and modify the minimal description, including particle gravitational quadrupole moments, at ∼m-1 scales.

    Original languageEnglish (US)
    Pages (from-to)4543-4549
    Number of pages7
    JournalPhysical Review D
    Volume51
    Issue number8
    DOIs
    StatePublished - 1995

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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