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Non-BPS States and Heterotic - Type I' Duality

T. Dasgupta, B. Stefanski

hep-tharXiv:hep-th/9910217

Abstract

There are two families of non-BPS bi-spinors in the perturbative spectrum of the nine dimensional heterotic string charged under the gauge group SO(16)× SO(16). The relation between these perturbative non-BPS states and certain non-perturbative non-BPS D-brane states of the dual type I theory is exhibited. The relevant branes include a 2 charged non-BPS D-string, and a bound state of such a D-string with a fundamental string. The domains of stability of these states as well as their decay products in both theories are determined and shown to agree with the duality map.

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