Massive higher spin states in string theory and gravitational quadrupoles

Ioannis Giannakis, James T. Liu, Massimo Porrati

    Research output: Contribution to journalArticlepeer-review


    In this paper we study three point functions of the type II superstring involving one graviton and two massive states, focusing in particular on the spin-7/2 fermions at the first mass level. Defining a gravitational quadrupole "h factor," we find that the nonminimal interactions of string states in general are parametrized by h ≠ 1, in contrast with the preferred field theory value of h = 1 (for tree-level unitarity). This difference arises from the fact that consistent gravitational interactions of strings are related to the presence of a complete tower of massive states, not present in the ordinary field theory case.

    Original languageEnglish (US)
    Article number104013
    Pages (from-to)1-8
    Number of pages8
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Issue number10
    StatePublished - May 15 1999

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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