Summary of the most significant results reported in this session

D1e most interesting although speculative result is the observation of a 4 standard deviation effect at 5. 3 GeV in the l)JK 0TI - and lj!K- 'ff+ mass plots (SPS Exp. WJ\11) with a crosssection of 180 nb (assuming 1 % branching ratio). This is a cancliclatc bare b-state. + Tiw next most significant experimental result is the observation of Ac at the CERN Intersecting Storage Rings (ISR). TI1is state was discovered at BNL by Samios et al. and has since been seen in several neutrino experiments. It was seen at the ISR by Lockman ct al. about a year ago (reported at Budapest) but not in a convincing way. The analysis has now been improved, and the result shows a peak which is most clearly present in the stnnmed A(31T)+ and K-p1T+ mass spectra. 'TI1e signal has furthennore been seen in Exp. R606 (reported - + by F. Muller in this parallel session) in both A3TI and pK TI . 111e most convincing signal comes from the Spli t-Ficlcl Magnet (SFM) in K-pn + 'TI1e three observations together, all at the ISR, make this an outstanding result of the conference, although it is not a new discovery. Very interesting contributions have been made by Brodsky and Berger on higher-twist effects. TI1is, in my opinion, is going to strongly influence the phenomenological analysis in the future. One prediction, the dependence of a in 1 +a cos 26 in TIP+μμ on X(μμ), has been verified by experiment (reported in Aubert's session by Pilcher). Also figuring high on the list of new developments are data as well as models for understanding parton dynrnnics in a11-hadronic reactions. TI1c work of Gunion, Hwa, and others, and a nwnber of experiments (Kp at llO GeV, ¢ production, correlations at the ISR, etc.) are of interest, but not fully conclusive at this stage. One might say that the Brodsky-Gunion counting rule is dead but it is not clear with what to replace it.