In the debris of hadron interactions lies the beauty of QCD
Abstract
Description
Recent progress in understanding the strong physics regime of QCD is described. The role played by condensates, particularly $q{\bar q}$, 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.
Presented at the Workshop on Gluonic Excitations, Thomas Jefferson National Accelerator Laboratory, Newport News, May 2003
Presented at the Workshop on Gluonic Excitations, Thomas Jefferson National Accelerator Laboratory, Newport News, May 2003