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

WALTER H. BARON, ADRIÁN R. LUGO

PHYSICS LETTERS B

Elsevier

Lugar: Amsterdam; Año: 2007 p. 243 - 252

0370-2693

We study systems of  $D6$ and $ar D 6$ branes with non zero world-volumemagnetic fields in the weak coupling limit.We find two configurations for which the conditions for absence of tachyons in the spectra coincide exactly withthose found in the low energy effective theory approach, for the systemsto preserve $ rac{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 orderinteraction amplitude, verifying the no force condition as well as the supersymmetric character of the spectrum.