Comments on geometric and universal open string tachyons near fivebranes

Details Comments on geometric and universal open string tachyons near fivebranes Comments on geometric and universal open string tachyons near fivebranes

2007-03-28

arxiv.org/abs/hep-th/0703261v2

JHEP 0704:085,2007

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 1 figure; ver. 2 to appear in JHEP: one comment, refs and appendices added

Scientific paper

10.1088/1126-6708/2007/04/085

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.

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