Anomaly Cancellations in the Type I D9-anti-D9 System and the USp(32) String Theory
High Energy Physics - Theory
2009-10-31 v2
Abstract
We check some consistency conditions for the D9-anti-D9 system in type I string theory. The gravitational anomaly and gauge anomaly for SO(n) x SO(m) gauge symmetry are shown to be cancelled when n-m=32. In addition, we find that a string theory with USp(n) x USp(m) gauge symmetry also satisfies the anomaly cancellation conditions. After tachyon condensation, the theory reduces to a tachyon-free USp(32) string theory, though there is no spacetime supersymmetry.
Keywords
Cite
@article{arxiv.hep-th/9905159,
title = {Anomaly Cancellations in the Type I D9-anti-D9 System and the USp(32) String Theory},
author = {Shigeki Sugimoto},
journal= {arXiv preprint arXiv:hep-th/9905159},
year = {2009}
}
Comments
17 pages + 10 eps figures, LaTeX; minor corrections, reference added, version to appear in Prog. Theor. Phys