6533b7d8fe1ef96bd126988b
RESEARCH PRODUCT
The A5 and the pion field
Johannes HirnVeronica Sanzsubject
Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryMesonField (physics)High Energy Physics::LatticeHigh Energy Physics::PhenomenologyFOS: Physical sciencesAtomic and Molecular Physics and OpticsSymmetry (physics)High Energy Physics - PhenomenologyPionHigh Energy Physics - Phenomenology (hep-ph)Goldstone bosonChiral symmetry breakingdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-10-03 |