[en] Preliminary F₂ and xF₃ structure functions from neutrino-nucleon scattering in the E733 fine grained detector at Fermilab are presented. During 1985 and 1987/88 fixed-target runs, the FNAL-E733 detector was exposed to the highest energy neutrino beam available, the Tevatron Quadrupole-Triplet Wide Band neutrino beam. The Quad-Triplet Beam offers the unique opportunity to study neutrino-nucleon scattering over a larger Q² range than in previous neutrino experiments. In addition, preliminary results on Λ_QCD will be presented. FMMF is a collaboration of Fermilab, Michigan State University, MIT, and the University of Florida

[en] From a large data set of charged current neutrino-nucleon interactions, double differential cross sections and nucleon structure functions have been measured. In addition, the Quantum Chromodynamics parameter A_QCD has been measured from the Q² evolution of the extracted structure functions

[en] The top quark's large mass gives it a unique role in Electroweak theory. In the 2 years since the observation of the top quark, the CDF and D0 collaboration have dramatically improved and extended the measurements of its mass. The status of the measurements and the future prospects are discussed in this paper. (author)

[en] Our recent paper (Nucl. Instrum. Methods A267(1988) p. 49-68) described an analysis of the energy deposition in hadronic showers at six incident particle energies from 33.8 to 415.4 GeV using the low-density fine-grained flash chamber calorimeter of the Lab C neutrino detector at Fermilab. More recent work on the subject has led us to revise some of the results presented for energies above 200 GeV. We present here revised results for the longitudinal and transverse energy deposition, and new coefficients for the parametrization of these curves. (orig./HSI)

[en] Hadronic showers at six incident particle energies from 33.8 to 415.4 GeV have been studied using the low-density fine-grained flash chamber calorimeter of the Lab C neutrino detector at Fermilab. Transverse distributions of unprecedented fine granularity have been obtained for a range of depths in the shower. Longitudinal energy distributions have been compared with those from iron-scintillator detectors. Some differences are observed which may be attributable to the different relative sensitivity of the two detector types to electromagnetic and hadronic shower components. Both longitudinal and transverse distributions have been parametrized. Fluctuations in energy deposition have been studied. The relative size of the fluctuations is largest near the starting vertex and in the tail of the shower, and falls slowly with increasing beam energy. Correlations between energy deposition in neighboring parts of the shower are observed, and anticorrelation is seen between energy deposition in the peak and in the tail of the shower. Containment lengths and widths have also been measured and parametrized. (orig.)

[en] This study reports the first measurement of the azimuthal decorrelation between jets with pseudorapidity separation up to five units. The data were accumulated using the D0 detector during the 1992 endash 1993 collider run of the Fermilab Tevatron at √s=1.8 TeV. These results are compared to next-to-leading order (NLO) QCD predictions and to two leading-log approximations (LLA) where the leading-log terms are resummed to all orders in α_S. The final state jets as predicted by NLO QCD show less azimuthal decorrelation than the data. The parton showering LLA Monte Carlo HERWIG describes the data well; an analytical LLA prediction based on Balitsky-Fadin-Kuraev-Lipatov resummation shows more decorrelation than the data. copyright 1996 The American Physical Society

[en] We present a search for events consistent with the production and decay of the squarks and gluinos of the minimal supersymmetric standard model (MSSM) in the D0 detector at the Fermilab Tevatron p bar p collider. We examined data for events containing large missing transverse energy and three or more jets. We observed no excess of events above the expected yield from standard model processes. For a choice of MSSM parameter values, we set a lower limit at the 95% confidence level on the mass of the gluino of 144 GeV/c² for all squark masses and a lower limit of 212 GeV/c² for equal squark and gluino masses

[en] The WWγ gauge boson couplings were measured using p bar p→lνγ+X (l=e,μ) events at √s=1.8 TeV observed with the D0 detector at the Fermilab Tevatron Collider. The signal, obtained from the data corresponding to an integrated luminosity of 13.8pb^-1, agrees well with the standard model prediction. A fit to the photon transverse energy spectrum yields limits at the 95% confidence level on the CP-conserving anomalous coupling parameters of -1.6<Δκ<1.8 (λ=0) and -0.6<λ<0.6 (Δκ=0). Similar limits are obtained for the CP-violating coupling parameters

[en] First experimental results are presented from a search for events with a rapidity gap between jets. The D0 detector was used to examine events produced by the Fermilab Tevatron p bar p collider at √s =1.8 TeV. The fraction of events with an observed rapidity gap between the two highest transverse energy (E_T) jets is measured as a function of the pseudorapidity separation between the jet edges (Δη_c). An upper limit at the 95% confidence level of 1.1x10^-2 is obtained on the fraction of events with non particles between the jets, for events with Δη_c>3 and jet E_T greater than 30 GeV

[en] The WWγ gauge boson couplings were measured using p bar p→lνγ+X (l=e,μ) events at √s=1.8 TeV observed with the D0 detector at the Fermilab Tevatron Collider. The signal, obtained from the data corresponding to an integrated luminosity of 13.8pb^-1, agrees well with the standard model prediction. A fit to the photon transverse energy spectrum yields limits at the 95% confidence level on the CP-conserving anomalous coupling parameters of -1.6<Δκ<1.8 (λ=0) and -0.6<λ<0.6 (Δκ=0). Similar limits are obtained for the CP-violating coupling parameters