On supersymmetric $D6$-$\bar D 6$ systems with magnetic fields

Details On supersymmetric $D6$-$\bar D 6$ systems with magnetic fields On supersymmetric $D6$-$\bar D 6$ systems with magnetic fields

2007-09-25

arxiv.org/abs/0709.3930v2

Phys.Lett.B656:243-252,2007

Physics

High Energy Physics

High Energy Physics - Theory

Latex file, no figures, 11 pages, references added, to be published in Physics Letters B

Scientific paper

10.1016/j.physletb.2007.09.031

We study systems of $D6$ and $\bar D 6$ branes with non zero world-volume magnetic fields in the weak coupling limit. We find two configurations for which the conditions for absence of tachyons in the spectra coincide exactly with those found in the low energy effective theory approach, for the systems to preserve 1/8 of the supersymmetries of the Type $IIA$ string theory vacuum. These conditions give rise to a four-parameter family of solutions in each case. We present further evidence of the stability of these systems by computing the lowest order interaction amplitude, verifying the no force condition as well as the supersymmetric character of the spectrum.

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