Obstructions and lines of marginal stability from the world-sheet
High Energy Physics - Theory
2010-01-15 v1
Abstract
The behaviour of supersymmetric D-branes under deformations of the closed string background is studied using world-sheet methods. We explain how lines of marginal stability and obstructions arise from this point of view. We also show why N=2 B-type branes may be obstructed against (cc) perturbations, but why such obstructions do not occur for N=4 superconformal branes at c=6, i.e. for half-supersymmetric D-branes on K3. Our analysis is based on a field theory approach in superspace, as well as on techniques from perturbed conformal field theory.
Keywords
Cite
@article{arxiv.0902.3177,
title = {Obstructions and lines of marginal stability from the world-sheet},
author = {Ilka Brunner and Matthias R. Gaberdiel and Stefan Hohenegger and Christoph A. Keller},
journal= {arXiv preprint arXiv:0902.3177},
year = {2010}
}
Comments
32 pages