The A5 and the pion field

Details The A5 and the pion field The A5 and the pion field

2005-10-03

arxiv.org/abs/hep-ph/0510023v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Typos corrected

Scientific paper

In this talk, an SU(Nf)xSU(Nf)Yang-Mills model with a compact extra-dimension is used to describe the spin-1 mesons and pions of massless QCD in the large-Nc. The right 4D symmetry and symmetry-breaking pattern is produced by imposing appropriate boundary conditions. The Goldstone boson fields are constructed using a Wilson line. We derive the low-energy limit (chiral lagrangian), discuss rho-meson dominance, sum rules between resonance couplings and the relation with the QCD high-energy behavior. Finally, we provide an analytic expression for the two-point function of vector and axial currents.

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