Comments on geometric and universal open string tachyons near fivebranes
High Energy Physics - Theory
2010-10-27 v2
Abstract
In a recent paper (hep-th/0703157), Sen studied unstable D-branes in NS5-branes backgrounds and argued that in the strong curvature regime the universal open string tachyon (on D-branes of the wrong dimensionality) and the geometric tachyon (on D-branes that are BPS in flat space but not in this background) may become equivalent. We study in this note an example of a non-BPS suspended D-brane vs. a BPS D-brane at equal distance between two fivebranes. We use boundary worldsheet CFT methods to show that these two unstable branes are identical.
Keywords
Cite
@article{arxiv.hep-th/0703261,
title = {Comments on geometric and universal open string tachyons near fivebranes},
author = {Dan Israel},
journal= {arXiv preprint arXiv:hep-th/0703261},
year = {2010}
}
Comments
8 pages, 1 figure; ver. 2 to appear in JHEP: one comment, refs and appendices added