In the debris of hadron interactions lies the beauty of QCD
Abstract
Recent progress in understanding the strong physics regime of QCD is described. The role played by condensates, particularly q q, in breaking chiral symmetry and generating constituent masses for u and d quarks is reviewed. The influence this has on hadrons with vacuum quantum numbers is emphasised. What we know of this sector from recent data on φ-radiative decays and from D decays to light hadrons is discussed. The key to further understanding is comprehensive analyses of such data, including that planned for Hall D at Jefferson Laboratory.
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