KTheory, Reality, and Orientifolds
Abstract
We use equivariant Ktheory to classify charges of new (possibly nonsupersymmetric) states localized on various orientifolds in Type II string theory. We also comment on the stringy construction of new Dbranes and demonstrate the discrete electricmagnetic duality in Type I brane systems with p+q=7, as proposed by Witten.
 Publication:

Communications in Mathematical Physics
 Pub Date:
 2000
 DOI:
 10.1007/s002200050793
 arXiv:
 arXiv:hepth/9901042
 Bibcode:
 2000CMaPh.210..621G
 Keywords:

 High Energy Physics  Theory
 EPrint:
 26 pages, harvmac, no figures