[en] Longitudinal and transverse momentum spectra of final state hadrons produced in deep-inelastic muon-deuterium scattering at incident muon energy of 490 GeV have been measured up to a hadronic center of mass energy of 30 GeV. The longitudinal distributions agree well with data from earlier muon-nucleon scattering experiments; these distributions tend to increase in steepness as the center of mass energy increases. Comparisons with e⁺e^- data at comparable center of mass energies indicate slight differences. The transverse momentum distributions show an increase in mean p_T² with an increase in the center of mass energy. (orig.)

[en] Results on the production of charged hadrons in muon-deuteron and muon-xenon interactions are presented. The data were taken with the E665 spectrometer, which was exposed to the 490 GeV muon beam of the Tevatron at Fermilab. The use of a streamer chamber as vertex detector provides nearly 4π acceptance for charged particles. The μD data are compared with the μXe data in terms of multiplicity distributions, average multiplicities, forward-backward multiplicity correlations, rapidity and transverse momentum distributions and of two-particle rapidity correlations of charged hadrons. The data cover a range of invariant hadronic masses W from 8 to 30 GeV. (orig.)

[en] Fermilab Experiment-665 measured deep-inelastic scattering of 490 GeV muons off deuterium and xenon targets. Events were selected with a range of energy exchange ν from 100 GeV to 500 GeV and with large ranges of Q² and x_Bj: 0.1 GeV²/c²< Q²<150 GeV²/c² and 0.001< x_Bj<0.5. The fractional energy (z) distributions of forward-produced hadrons from the two targets have been compared as a function of the kinematics of the scattering; specifically, the kinematic region of ''shadowing'' has been compared to that of nonshadowing. The dependence of the distributions upon the order of the hadrons, determined by the fractional energies, has been examined as well; a strong degree of similarity has been observed in the shapes of the distributions of the different order hadrons. These z distributions, however, show no nuclear dependence, even in the kinematic region of shadowing

[en] The first measurements of forward multijet rates in deep-inelastic lepton scattering are presented. Data were taken with a 490-GeV muon beam incident on a hydrogen target. The jets were defined using the GADE algorithm. The measured rates are presented as a function of the jet resolution parameter y_cut, and as a function of the virtual-photon--proton center-of-momentum energy W, in the range 13≤W≤33 GeV. Comparisons are made to the predictions of the Lund Monte Carlo programs and good agreement is obtained when QCD corrections are included in the model

[en] In this paper the spectrometer constructed by the E665 Collaboration is described. The spectrometer was built during the period 1982-87 and the first data were taken during the 1987-88 Fixed Target run of the Fermi National Accelerator Laboratory (FNAL) Tevatron. This is the first of a series of runs in which a comprehensive program of high energy muon scattering experiments will be performed. (orig.)

[en] The ratio of cross sections for inelastic muon scattering on xenon and deuterium nuclei was measured at very low Bjorken x (0.000 02< x_Bj<0.25). The data were taken at Fermilab experiment E-665 with a 490 GeV/c muon beam incident on liquid deuterium and gaseous xenon targets. Two largely independent analysis techniques gave statistically consistent results. The xenon-to-deterium per-nucleon cross-section ratio is constant at approximately 0.7 for x_Bj below 0.003

[en] The production of K⁰, Λ and anti Λ particles is studied in the E665 muon-nucleon experiment at Fermilag. The average multiplicities and squared transverse momenta are measured as a function of x_F and W². Most features of the data can be well described by the Lund model. Within this model, the data on the K⁰/π^± ratios and on the average K⁰ multiplicity in the forward region favor a strangeness suppression factor s/u in the fragmentation process near 0.20. Clear evidence for QCD effects is seen in the average squared transverse momentum of K⁰ and Λ particles. (orig.)

[en] Inelastic scattering of 490 GeV μ⁺ from deuterium and xenon nuclei has been studied for x_Bj>0.001. The ratio of the xenon/deuterium cross section per nucleon is observed to vary with x_Bj, with a depletion in the kinematic range 0.001< x_Bj<0.025 which exhibits no significant Q² dependence. An electromagnetic calorimeter was used to verify the radiative corrections. (orig.)