Nonlinear Boundary Dynamics and Chiral Symmetry in Holographic QCD

Details Nonlinear Boundary Dynamics and Chiral Symmetry in Holographic QCD Nonlinear Boundary Dynamics and Chiral Symmetry in Holographic QCD

2011-12-23

arxiv.org/abs/1112.5643v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 3 eps figures. v2: Minor changes, references added

Scientific paper

In a hard-wall model of holographic QCD, we find that nonlinear boundary dynamics are required in order to maintain the correct pattern of explicit and spontaneous chiral symmetry breaking beyond leading order in the pion fields. With the help of a field redefinition, we relate the requisite nonlinear boundary conditions to a standard Sturm-Liouville system. Observables insensitive to the chiral limit receive only small corrections in the improved description, and classical calculations in the hard-wall model remain surprisingly accurate.

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