About the stability of a D4-anti D4 system

ADRIÁN R. LUGO

NUCLEAR PHYSICS B

Elsevier

Lugar: Amsterdam; Año: 2004 p. 299 - 333

0550-3213

We study a system of coincident $D4$ and $ar D 4$ branes with non zero world-volumemagnetic fields in the weak coupling limit.We show that the conditions for absence of tachyons in the spectrum coincide exactly withthose found in hep-th/0206041, in the low energy effective theory approach, for the systemto preserve a $ rac 14$ of the supersymmetries of the Type IIA string theory vacuum.We present further evidence about the stability of the system by computing the lowest orderinteraction amplitude from both open and closed channels, thus verifying the no forcecondition as well as the supersymmetric character of the spectrum.A brief discussion of the low energy effective five dimensional world-volume theory is given.