Notes on unoriented D-brane instantons
Abstract
In the first lecture, we discuss basic aspects of worldsheet and penta-brane instantons as well as (unoriented) D-brane instantons, which is our main focus here, and threshold corrections to BPS-saturated couplings. The second lecture is devoted to non-perturbative superpotentials generated by `gauge' and `exotic' instantons living on D3-branes at orientifold singularities. In the third lecture we discuss the interplay between worldsheet and D-string instantons on . We focus on a 4-fermi amplitude, give Heterotic and perturbative Type I descriptions, and offer a multi D-string instanton interpretation. We conclude with possible interesting developments.
Cite
@article{arxiv.0909.2173,
title = {Notes on unoriented D-brane instantons},
author = {Massimo Bianchi and Marine Samsonyan},
journal= {arXiv preprint arXiv:0909.2173},
year = {2010}
}
Comments
31 pages. Based on lectures delivered by M. Bianchi at the Fourth Young Researchers Workshop of the European Superstring Theory Network in Kounnas Bay, Cyprus, September 2008