[en] This report discusses the following research: fixed target experiments; collider experiments; computing, networking and VAX upgrade; SSC preparation, detector development and detector construction; solid argon calorimetry; absorption of CAD system geometries into GEANT for SSC; and particle theory programs

No abstract available

[en] Data-taking is reported in an experiment studying high P/sub t/ one- and two-particle inclusive production. E/iota events have been observed from π^-p and antipp. The Cabbibo-suppressed decay D→phi π, K/sup */⁰(2060)→phiKπ, and forward K/sup */(892) production have been observed, as well as various modes of production and decay of strange baryons. Analysis of an experiment on high P/sub t/ jets and dimuon production is reported as continuing. A large part of the theoretical work reported has been in the area of perturbative QCD calculations, with much of the emphasis being aimed at topics relevant to existing or proposed colliders. The recent creation of the Supercomputer Computations Research Institute (SCRI) has opened up new possibilities in this area. Investigations into Monte Carlo simulations of field theoretic models have been started. 39 refs

[en] The experimental effort reported was divided between fixed target physics and preparation for future collider experiments. Experiments include di-hadron high p/sub t/ inclusive production, E/iota decay, work in preparation for the DO collider experiment (particularly building the central uranium calorimeter, software and electronics development, and beam testing and calibration), and generation of Monte Carlo events for the CERN ALEPH collider experiment. A theoretical program is also reported which includes the phenomenology of strong and electroweak interactions and Monte Carlo simulations of various field theories

No abstract available

[en] Semi-inclusive π⁰ multiplicity distributions for 2--14 charged prongs are obtained using a generating-function approach based on an expansion in terms of Mueller moments. The four-prong data require the explicit assumption of a two-component model. Under this assumption and the further assumption of no three-neutral-particle correlations, the total pion multiplicity is obtained. The total multiplicity shows peaking at even prongs, indicative of G-parity-conserving diffractive processes which dominate at lower multiplicities. The cross section for these processes is approx.4 mb

No abstract available

[en] This paper presents the results of a study of the reaction K^-d → (p/sub s/) Λ⁰π^-. The cross section for the process K^-n → Λ⁰π^- has been measured as a function of the center-of-mass energy in the range from 1550 to 1650 MeV. An energy-dependent partial-wave analysis was performed for this reaction, and two acceptable solutions were found. The first solution indicated no resonant structure in this energy range below the Σ (1670). The second solution indicated resonant structure in the S₁₁ partial wave with E/sub R/ = 1600 +- 6 MeV/c², GAMMA (E/sub R/) = 87 +- 19 MeV/c², and x = 0.12 +- 0.02

[en] Neutral-pion production in 250-GeV/c π^-p interactions are studied using the Fermilab 15-ft bubble chamber. The mean number of neutral pions produced is 3.54 +- 0.15 per inelastic collision and a fit to a linear dependence on the charged multiplicity gives < n₀> = 1.30+0.56. The π⁰ transverse- and longitudinal-momentum distributions are obtained from the inclusive γ-ray data and compared with the distribution obtained from those π⁰'s which have both decay γ rays converting in the bubble chamber

[en] The K/subS/K/subS/ mass spectrum is studied in a π⁺d experiment at 15 GeV/c. Two separate mass enhancements at (1047 +- 10) and (1190 +- 10) MeV are observed. The lower mass enhancement is most likely associated with the S* and the delta while the one at 1190 MeV could be a new resonance or the A₁.₅. Neither enhancement is produced peripherally. An interesting interpretation of this nonperipherality is that the decay of the S* or delta is dependent on the charge of the beam meson