Realization of Brane Descent Relations in Effective Theories

We examine Sen’s descent relations among (non-)BPS D-branes by using low energy effective field theories of DpD̄p system. We find that the fluctuation around the kink solution reproduces the low energy matter content on a nonBPS D(p−1)-brane. The effective action for these fluctuation modes turns out to be a generalization of Minahan-Zwiebach model. In addition, it is shown that the fluctuations around the vortex solution consist of massless fields on a BPS D(p− 2)-brane and they are subject to Dirac-Born-Infeld action. We find the universality that the above results do not refer to particular forms of the effective action. Moved from ITP, USCB. [email protected] [email protected]