We study the low energy dynamics of pions in a gravity dual of chiral
symmetry breaking. The string theory construction consists of a probe D7
brane in the Constable Myers non-supersymmetric background, which has
been shown to describe chiral symmetry breaking in the pattern of QCD.
We expand the D7 brane’s Dirac Born Infeld action for fluctuations that
correspond to the Goldstone mode and show that they take the form of a
non-linear chiral lagrangian. We numerically compute the quark
condensate, pion decay constant and higher order Gasser Leutwyler
coefficients. We find their form is consistent with naive dimensional
analysis estimates. We also explore the gauging of the quark’s chiral
symmetries and the vector meson spectrum.