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 Date: 2008-12-19 10:01:02Quantum chromodynamics Standard Model Quark matter Flavour Chiral symmetry Fermionic condensate Spontaneous symmetry breaking Nucleon Quark Physics Particle physics Quantum field theory |
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Chiral symmetry breaking by instantons Chiral symmetry breaking by definition The QCD Lagrangian with Nf massless flavors is known to posses a large global symmetry, namely a symmetry under U (Nf ) × U (Nf ) independent