[en] Preliminary results are presented on dilepton in the 15-ft bubble chamber filled with heavy neon exposed to a wideband neutrino beam at the Fermi National Accelerator Laboratory. The results are preliminary in the sense that more events of this type will be accumulated as the analysis of the present exposure progresses, and further exposures at Fermilab, intended to triple the data sample, are planned in the near future. Asymmetric Dalitz pairs, anti ν/sub e/ interactions, rate of μ^-e events, and strange particle production are discussed

[en] A summary is given of charged particle multiplicity moments up to Ferimlab energies and comparisons are made between the distributions obtained in different reactions. Inclusive single π^+- production is discussed in terms of the energy dependence observed in the central and target fragmentation regions. New data are presented on the energy and multiplicity dependence of semi-inclusive π^- production at 90⁰ CM. Two-particle rapidity correlations are studied as a function of √s, and it is found that the three-particle density may be expressed in terms of one- and two-particle densities. New data on charged particle production from 100 GeV/c p^+-p, π^+-p interactions are presented as the sums and differences of the four reactions and the rapidity distributions for proton and pion fragmentation and central pionization and annihilation are obtained

[en] The experimental data on single direct lepton production in hadron collisions are reviewed. The general picture emerging from recent studies of muon production is one in which prompt muons are produced principally in pairs arising from a μμ continuum and the decay of vector mesons into μ pairs. The origin of the continuum is still unclear

[en] The new data in high energy neutrino physics reviewed are beams, experimenters and detectors, charged and neutral current cross sections, deep inelastic data - x,y, Q², multiplicities, inclusive distributions, etc. for charged-current and neutral events, individual nonstrange resonances, strange particle events, and a search for exotics. 50 references

[en] The interpretation of recent results on elastic scattering and inelastic diffractive scattering is discussed. Regge pole and geometrical concepts are used to describe the t and s dependence of elastic scattering. Inelastic scattering is discussed primarily within the framework of the triple Regge model

[en] The topics discussed for hadronic interaction mechanisms are the dual string model, high energy hadron nucleus collisions, and the phase transition which occurs in solutions of the Reggeon field theory at high energy. 18 references

[en] The consequences of having a new heavy quark in addition to the u, d, and s quarks (sometimes denoted q) and particularly the resulting c anti c, c anti q, and cqq spectroscopy. This is done in the general framework of a picture of matter as composed of spin-¹/₂ leptons and quarks, the latter bound together by an SU(3) octet of vector gluons coupled to the three color degrees of freedom of the quarks to form the color singlet hadrons. The growing evidence for a heavy lepton is reviewed, and then the likelihood of even more heavy quarks and the resulting direction of spectroscopy in the future are examined. 103 references

[en] The new experimental results are summarized on the questions of scaling, nucleon structure functions, hadron distributions, and other related subjects in electron/muon scattering. 10 references

[en] Multilepton production by neutrinos and anti-neutrinos which has now been observed at every high energy proton accelerator is reviewed. The data provide compelling support for the neutrino production and decay of single charmed particles. There is also evidence for either D⁰-anti D⁰ mixing or appreciable pair production of charmed particles. Both explanations fit the data. Limits on the rate for charm changing neutral current reactions are presented. Evidence is presented for the possible production and decay of a high mass state (approximately 4 to 5 GeV) with a new flavor produced by antineutrinos

[en] A limited review is given of weak interaction experiment and theory. Three recent theoretical developments relevant to quark-lepton models of the weak interaction, implications of recent experimental results on these models, and a few aspects of the Pati-Salam gauge model with integer, nonconfined quarks, leptons, and gluons are considered. 93 references