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Chiral dynamics from AdS space

Chiral dynamics from AdS space
Chiral dynamics from AdS space
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 nonsupersymmetric 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 nonlinear 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.
1550-7998
046002-[11pp]
Evans, Nick
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3
Shock, Jonathan P.
1b2d9076-cb7f-492e-b85d-b7513c16a2ee
Evans, Nick
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3
Shock, Jonathan P.
1b2d9076-cb7f-492e-b85d-b7513c16a2ee

Evans, Nick and Shock, Jonathan P. (2004) Chiral dynamics from AdS space. Physical Review D, 70 (4), 046002-[11pp]. (doi:10.1103/PhysRevD.70.046002).

Record type: Article

Abstract

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 nonsupersymmetric 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 nonlinear 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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Published date: 17 August 2004
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Local EPrints ID: 28761
URI: https://eprints.soton.ac.uk/id/eprint/28761
DOI: doi:10.1103/PhysRevD.70.046002
ISSN: 1550-7998
PURE UUID: 33b7597a-063a-46f3-90b7-ea2c4e271e90

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Date deposited: 08 May 2006
Last modified: 15 Jul 2019 19:10

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Author: Nick Evans
Author: Jonathan P. Shock

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