Matching the BPS Spectra of Heterotic - Type I - Type I' Strings
High Energy Physics - Theory
2009-10-30 v2
Abstract
We give a detailed discussion of the matching of the BPS states of heterotic, type I and type I' theories in d=9 for general backgrounds. This allows us to explicitly identify these (composite) brane states in the type I' theory that lead to gauge symmetry enhancement at critical points in moduli space. An example is the enhancement of to .
Keywords
Cite
@article{arxiv.hep-th/9710247,
title = {Matching the BPS Spectra of Heterotic - Type I - Type I' Strings},
author = {D. Matalliotakis and H. P. Nilles and S. Theisen},
journal= {arXiv preprint arXiv:hep-th/9710247},
year = {2009}
}
Comments
11 pages; minor typos in eq. (3), (4) and on page 9 have been corrected; two footnotes taking into account additional references have been added; version to appear in Physics Letters B