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arXiv · hep-th/9809142

Massive Higher Spin States in String Theory and the Principle of Equivalence

Ioannis Giannakis·James T. Liu·Massimo Porrati
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Abstract

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 non-minimal interactions of string states in general are parametrized by $h\ne1$, in contrast to 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.

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Ioannis Giannakis, James T. Liu, Massimo Porrati. 1998-09-22. Massive Higher Spin States in String Theory and the Principle of Equivalence. https://doi.org/10.1103/physrevd.59.104013

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