[en] In this meeting the following questions were studied: collider physics; quantum chromodynamics; intermittency; spin physics; heavy flavour production; heavy ion collisions; spectroscopy

[en] We have measured the ψ production at Fermilab using π^- and antip beams of 125 GeV/c incident on Be, Cu and W targets. We discuss results concerning the A dependence, the nuclear - target effects on the ψ production and the extraction of the gluon structure functions of the pion and the antiproton

[en] Proton spectra of Streamer Chamber data from central ¹⁶O and ³²S on S and Au collisions at 200 GeV/nucl. are studied. Proton spectra are produced by subtracting the spectrum of the negatively charged particles from that of the positively charged ones. The rapidity distribution of the protons show a rather flat behavior in the rapidity intervall 0< y<3. Transverse momentum spectra in two rapidity regions are discussed in terms of a thermal fireball and a model with superimposed radial flow. Both models agree well with the data, the flow model also fits the pion P_T spectra

[en] We report the first observation of the Ξ_c⁰ baryon, confirm the smallness of the isospin violating mass splitting of the Σ_c baryon and confirm two D** states

[en] For many years already the comparison of hadron production in deep inelastic lepton scattering on different nuclei is regarded as an ideal tool to investigate the space-time structure of the hadronisation process, the understanding of which would be helpful to explain effects in hadron nucleus and nucleus nucleus collisions. More recently it was also discussed, whether information about the hadronic final state can contribute to resolve the puzzle of the EMC effect. The study of each of these problems requires an accurate measurement of hadron distributions in a wide range of energy and momentum transfer ν and Q². In 1984/85 the EMC has taken muon scattering data on various nuclear targets at high beam energies (100-280 GeV) using the NA2-spectrometer with a good acceptance for forward produced hadrons. Systematic errors for ratios of multiplicities could be reduced to a 1-2% level by measuring simultaneously on D₂ and one of the heavy targets (C, Cu, Sn)

[en] During the 1987-8 fixed-target run at Fermilab, E-769 recorded 500 million interactions of 250 GeV/c π^-, K^-, π⁺, K⁺, and p on a target consisting of 26 thin foils of Be, Al, Cu, and W. A global transverse energy trigger rejected four out of five interactions. Silicon microstrip detectors are used to locate charm decay vertices. Event reconstruction is in progress on farms of ACP microprocessors and is beginning on RISC workstations. Charm Φ and ΦΦ production are examined in a preliminary sample of 18 million positive beam events

[en] We discuss an application of finite temperature QCD to lepton-pair production in a quark-gluon plasma. The perturbative calculation is performed within the real-time formalism. After cancellation of infrared and mass singularities, the corrections at 0(α_S) are found to be very small in the region where the mass of the Drell-Yan pair is much larger than the temperature of the plasma. Interesting effects, however, appear at the annihilation threshold of the thermalized quarks

[en] The main results on the J/Ψ suppression observed in the NA38 experiment in oxygen-uranium, oxygen-copper and sulphur-uranium central collisions at 200 GeV/nucleon are summarized. An analysis is made of the models which have been proposed to try explaining the experimental data. Two classes of models are considered: one which assumes the existence of a quark-gluon plasma, another which assumes J/Ψ absorption by inelastic scattering in some hot dense hadronic matter, either without or with initial state parton interactions. The present status of the subject is summarized in the conclusions

[en] Selected results of measurements of inclusive π, K and proton spectra from 14,5 GeV/c/u Si collisions with Au are presented. Charged particle dN/dη distributions on Al and Au are also discussed. The data are compared to predictions of the FRITIOF model

[en] The coming year will see the establishment near Dallas, Texas, of a new laboratory and the first steps toward construction of a proton-proton collider 84 km in circumference. I report on the steps being taken to organize the laboratory and to plan for the experimental program, and I comment briefly on research and development for the collider and its complement of detectors