e+e- colliding beams and their contributions to the knowledge of quarks and leptons

This chapter considers the ratio of the total cross section for hadron production to the simple QED cross section for muon-pair production. Examines new vector-mesons (cc-) with regard to spin, parity, charge conjugation, G-parity, isospin, masses and branching ratios. Discusses D-states characteristics; F-states characteristics; a heavy lepton and its neutrino; recent PETRA results; and jet structure and the relation to new physics. Presents a graph showing the ratio of the total hadronic cross section to the muon-pair cross section as a function of center of mass energy. Points out that the region just above vector-meson (cc-) production near 4 GeV is very complex with many peaks and the whole field of D and F physics. Suggests that this is a region which will probably be best studied by the CESR machine at Cornell. Notes that finding evidence for t quark is the first priority now for PETRA