[en] We present selected results on strong interaction physics from the SLD experiment at the SLAC Linear Collider. We report on several new studies of 3- and 4-jet hadronic Z⁰ decays, in which jets are identified as quark, antiquark or gluon. The 3-jet Z⁰ → bb-bar g rate is sensitive to the b-quark mass; prospects for measuring m_b are discussed. The gluon energy spectrum is measured over the full kinematic range, providing an improved test of QCD and limits on anomalous bbg couplings. The parity violation in Z⁰ → bbg decays is consistent with electroweak theory plus QCD. New tests of T- and CP-conservation at the bbg vertex are performed. A new measurement of the rate of gluon splitting into bb pairs yields g_bb = 0.0031 ± 0.0007(stat.) ± 0.0006(syst.) (Preliminary). We also present a number of new results on jet fragmentation into identified hadrons. The B hadron energy spectrum is measured over the full kinematic range using a new, inclusive technique, allowing stringent tests of predictions for its shape and a precise measurement of (κ_B) = 0.714 ± 0.005(stat.) ± 0.007(syst.) (Preliminary). A detailed study of correlations in rapidity y between pairs of identified π^±, K^± and p/p confirms that strangeness and baryon number are conserved locally, and shows local charge conservation between meson-baryon and strange-nonstrange pairs. Flavor-dependent long-range correlations are observed for all combinations of these hadron species, yielding new information on leading particle production. The first study of correlations using rapidities signed such that y > 0 corresponds to the quark direction provides additional new insights into fragmentation, including the first direct observation of baryon number ordering along the qq axis

No abstract available

[en] We present measurements of identified hadron spectra in e⁺e^- hadrons from the BABAR and SLD experiments at respective c.m. energies of 10.54 GeV and 91.2 GeV. The scaling violations between the two energies are found to be large and described by hadronization models for charged pions, but not for heavier hadrons. SLD measurements show large differences between b(bar b), c(bar c) and light-flavor events that are qualitatively consistent with expectations. The light flavor events are somewhat more consistent with the predictions of MLLA QCD than are events of all flavors, but a discrepancy in the mass dependence remains. SLD have made several new and/or improved measurements of light leading particle production, paving the way for future tagging of u, d and s jets. They have also made a unique study of signed rapidity correlations, showing direct evidence for charge ordering of protons along the quark-antiquark axis

[en] Z⁰ bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary QCD results based on the first 6000 such decays. We find good agreement between the inclusive properties of these data and the predictions of perturbative QCD plus fragmentation models. The strong coupling, α_s, has been measured by three methods: jet rates yield α_s(M_Z) = 0.119 ± 0.002 (stat.) ± 0.003 (exp.syst.) ± 0.014 (theor); energy-energy correlations yield α_s(M_Z) = 0.121 ± 0.002 ± 0.004 ±_0.009^0.0016; the energy-energy correlation asymmetry gives α_s(M_Z) = 0.108 ± 0.003 ± 0.005 ± _0.003^0.008

[en] The kinetics of uranium is studied here, and especially at the kidney level. The purpose was to check if the endocytosis was the process transport of this element. It is suggested that it is the principal cell mechanisms of the uranium absorption, and the NaPi transporters transport the cytotoxic fraction of this actinide. (N.C.)

[en] The authors present new studies of 3-jet final states from hadroniz Z⁰ decays recorded by the SLD experiment, in which the quark, antiquark, and gluon jets are identified. The gluon energy spectrum, measured over the full kinematic range, is consistent with the predictions of QCD, and they derive a limit on an anomalous chromomagnetic bbg coupling. They measure the parity violation in Z⁰ decays into b anti bg to be consistent with the predictions of electroweak theory and QCD, and perform new tests of T- and CP-conservation at the bbg vertex

[en] The authors present studies of leading particle production in Z⁰ decays into light, c, and b quarks performed with the SLD experiment at SLAC. The SLD precision vertex detector was exploited to tag light-flavor events, to tag charmed meson vertices and separate the prompt and B-decay components, and to reconstruct B-hadrons partially. The relative production of prompt pseudoscalar and vector D-mesons was measured to be P_V = 0.53 ± 0.06(stat.) ± 0.02(syst.) (preliminary). The shape of the B-hadron energy spectrum was found to be consistent with the predictions of a number of models, and the average energy fraction was measured to be < x_E> = 0.697 ± 0.012(stat.) ± 0.028(syst.) (preliminary). Separation of light quark and antiquark jets was achieved using the highly polarized SLC electron beam, and hadrons were identified using the SLD Cherenkov Ring Imaging Detector. Production of particles and antiparticles in quark jets was compared, allowing the first direct observation of leading particles in e⁺e^- → u anti u, d anti d, s anti s events. More high momentum baryons and K^-'s than antibaryons and K⁺'s were observed, providing evidence for leading baryon and kaon production, as well as for strangeness suppression at high momentum

[en] The authors have searched for inclusive signatures of polarization in hadronic jets from Z⁰ → q bar q decays using the open-quote jet handedness close-quote method. They exploited the large polar angle asymmetry induced by the high SLC electron beam polarization to select samples of quark jets and antiquark jets, expected to be left- and right-polarized respectively. They find no evidence for jet handedness in their global sample and set a preliminary upper limit of 7% at 95% C.L. on the magnitude of the analyzing power of this technique. They have used the SLD vertex detector to exclude events containing heavy (b, c) quarks, in which the handedness is expected to be small due to the dominance of decays of spinless mesons. They find no evidence for jet handedness in this high-purity sample of light (u, d and s) quark jets, and set a preliminary upper limit of 11% on the magnitude of the analyzing power in this case. They have investigated several alternative definitions of jet handedness in an attempt to optimize the analyzing power. They find no evidence of jet handedness by any method

[en] A method to determine with gas Cerenkov counters the Lorentz factor, gamma = E/mc, of cosmic ray nuclei with high accuracy over the range gamma approx. 20 to 100 is discussed. The measurement of the Cerenkov emission angle theta, by use of a suitable imaging system is considered. Imaging counters, the ring imaging Cerenkov counters (RICH), were developed for use on accelerators. The image of off-axis particles to determine the amount of image distortion as a function of the direction of the incoming nucleus is examined and an acceptance solid angle, relative to the optical axis, within which the nucleus produces an image with an acceptable level of distortion is defined. The properties of the image, which becomes elliptical, for off-axis particles are analyzed

[en] Z⁰ bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary QCD results based on the first 6000 such decays. We find good agreement between the inclusive properties of these data and the predictions of perturbative QCD plus fragmentation models. The strong coupling, α_s, has been measured by three methods: jet rates yield α_s(M_Z)=0.119±0.002(stat.)±0.003(exp. syst.)±0.014(theor.); energy-energy correlations yield α_s(M_Z)=0.121±0.002±0.004±^0.016_0.009; and the energy-energy correlation asymmetry gives α_s(M_Z)=0.108±0.003±0.005±^0.008_0.003