Chiral Dynamics From AdS Space

Details Chiral Dynamics From AdS Space Chiral Dynamics From AdS Space

2004-03-29

arxiv.org/abs/hep-th/0403279v1

Phys.Rev. D70 (2004) 046002

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, LaTeX, 7 figures

Scientific paper

10.1103/PhysRevD.70.046002

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.

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