[en] A proposal was submitted to Fermilab for a Booster Neutrino Experiment (BooNE) to confirm the discovery of neutrino oscillations at LANL using a Liquid Scintillator Neutrino Detector (LSND). The location of the experiment at the Fermilab Booster will provide for higher signal rates than were possible at LSND by about an order of magnitude. BooNE will also provide an opportunity for observing the signal under very different conditions and with different systematics than were present at LSND. The muon collider will provide an opportunity to further explore this region of parameter space with a different set of systematics. Most important will be that the neutrino flux will be accurately known, since the current of the parent muon beam can be measured very precisely. This source will provide a and flux equal in magnitude and with easily calculable energy and spatial distributions

[en] In this paper we present preliminary results of a coherent amplitude analysis of three-pion decays of charm mesons. The analysis includes a greater number of possible resonant states than in previous analyses, and produces masses and Breit-Wigner widths of the isoscalar resonances f₀(980) and f₀(1370) with better precision than previous measurements. We also present preliminary results for the mass and width of the low lying f₀(400), sometimes called the σ meson. (author)

[en] The need for an SSC test beam of energy greater than one TeV was discussed in Snowmass 86; Such a beam could be created from the neutral debris from an interaction region as a parasitic operation. In the same reference, the possibility of extracting a 20 TeV beam with a bent crystal was mentioned. This year it is more apparent that a low intensity, 20 TeV extracted bean would be highly desirable. Experiments which study the properties of short lived particles, for which the average decay path is long in the lab frame in a fixed target experiment, can be done in such a beam. In particular, a fixed target Beauty detector running at Fermilab would require about 10⁸ protons per second. In this paper, the authors explore in some detail the possible yield of a bent crystal beam and its impact on collider operations

[en] A comparison of measurements of prompt single muons, produced in the forward direction by 400-GeV proton interactions, with the results of measurements of muon pairs produced under the same conditions shows that the pair intensity accounts for the inclusive single-muon flux in a manner which is insensitive to the details of the production and decay of the muon pairs. The mean invariant mass of the pairs is about 900 MeV/c²

No abstract available

[en] The polarization of 185-GeV prompt muons produced in the forward direction by the interaction of 400-GeV protons has been measured to be P=0.00 +- 0.10 along their direction of flight. The null value for the polarization suggests that the muons are produced through electromagnetic interactions

[en] Two attempts have been made recently at Fermilab to use channeling in bent crystals to provide beam attenuation and deflection of 800 GeV protons. One attempt was quite successful, attenuating a high intensity beam by a factor of 2000 to provide a useful beam at an emulsion experiment. This represents the highest energy where channeling has been observed. The other attempt failed but led to useful insights on how to improve the technique. The possiblity of bent crystals as phase space monitors is discussed. (orig.)

[en] Nucleon structure functions obtained from neutrino and anti-neutrino scattering on iron nuclei at high energies (Esub(ν)=30 to 250 GeV) are presented. These results are compared with the results of other lepton-nucleon scattering experiments. The structure functions are used to test the validity of the Gross-Llewellyn-Smith sum rule, which measures the number of valence quarks in the nucleons, and to obtain leading and second order QCD fits. (orig.)

[en] In an experiment to measure the cross section for ν-N interactions, the neutrino flux is inferred from measured properties of the secondary hadron beam. The measurements of intensity, composition, and phase space are inputs to a Monte Carlo program which simulates the neutrino beam impinging on the experimental target detector. The components, technical design, and calibration of the devices which monitor the secondary beam are discussed. The accuracy with which the neutrino flux can be determined, given the limitations of the secondary beam monitoring, is also indicated. (orig.)

[en] Using the large hadro-produced charm sample collected in experiment E791 at Fermilab, we report the first directly measured constraint on the decay-width difference ΔΓ for the mass eigenstates of the D⁰ -D⁰ system. We obtain our result from lifetime measurements of the decays D⁰→K^-π⁺ and D⁰→K^-K⁺ , under the assumption of CP invariance, which implies that the CP eigenstates and the mass eigenstates are the same. The lifetime of D⁰→K^-K⁺ (the CP-even final state) is τ_KK=0.410±0.011±0.006 ps , and the lifetime of D⁰→K^-π⁺ (an equal mixture of CP-odd and CP-even final states) is τ_Kπ=0.413±0.003±0.004 ps . The decay-width difference is ΔΓ=2(Γ_KK-Γ_Kπ)=0.04±0.14±0.05 ps^-1 . We relate these measurements to measurements of mixing in the neutral D -meson system. copyright 1999 The American Physical Society