  We study the stability of the giant gravitons in the string theory background
with NSNS B field. We consider the perturbation of giant gravitons formed by a
probe D$(8-p)$ brane in the background generated by D$(p-2)$-D$(p)$ branes for
$2 \le p \le 5$. We use the quadratic approximation to the brane action to find
the equations of motion. For $p=5$, giant graviton configurations are stable
independent of the size of the brane. For $p \ne 5$, we calculated the range of
the size of the brane where they are stable. We also present the mode
frequencies explicitly for some special cases.

High Energy Physics - Theory