Experimental Challenges for QCD - The past and the future

Abstract

The past leaves the surprising experimental successes of the simple constituent quark model to be expained by QCD. Surprising agreement with experiment from simple Sakharov-Zeldovich model (1966) having quarks with effective masses and hyperfine interaction. Nambu's (1966) Colored quarks with gauge gluons gave mass spectrum with only $qqq$ and $\bar{q}$ bound states. The future opens the way to new insight into QCD from heavy flavor experiments

arXiv comment19 pages, typo in e-mail address corrected