european organization for nuclear research cern geneva, switzerland czech technical university...

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perturbative QCD: L QCD (q,g) interaction  „weak“ (asympt. freedom): expansion in coupling Check only L sym chiral sym. & break: L eff (GB: ,K,  ) interaction  „strong“ (confinement) - but: expansion in energy Check L sym as well as L break-sym q-condensate QFD QCD QED Standard Model Q>>Q