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    A determination of the properties of the neutral intermediate vector boson Z0 (English)

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    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; 231 , 4 ; 509-518  ; 1989
    • ISSN:
      0370-2693
    • Article (Journal)  /  Electronic Resource

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    Abstract We report the results of first physics runs of the L3 detector at LEP. Based on 2538 hadron events, we determined the mass m z 0 and the width Γz0 of the intermediate vector boson Z0 to be m z0=91.132±0.057 GeV (not including the 46 MeV LEP machine energy uncertainty) and Γ z0=2.588±0.137 GeV. We also determined Γ invisible=0.567±0.080 GeV, corresponding to 3.42±0.48 number of neutrino flavors. We also measured the muon pair cross section and determined the branching ratio Γ μμ=Γ h=0.056±0.006. The partial width of Z0→e+e− is Γ ee=88±9±7 MeV.

    Table of contents – Volume 231, Issue 4

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    The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

    335
    Magnetic moments of hyperons in the bound state approach to the skyrme model
    Kunz, J. / Mulders, P.J. et al. | 1989
    341
    A new mechanism for NN̄ annihilation into three mesons in the constituent quark model
    Kalashnikova, Yu.S. / Yurov, V.P. et al. | 1989
    346
    Lifetime of the 2798 keV state of 21Na and its relevance for parity mixing detection
    Bini, M. / Bizzeti, P.G. / Bizzeti-Sona, A.M. / Seuthe, S. / Waanders, F.B. / Rolfs, C. et al. | 1989
    351
    On the spin-dependence of the 6Li-120Sn interaction
    Rusek, K. / Jänsch, H.J. / Becker, K. / Blatt, K. / Korsch, W. / Leucker, H. / Luck, W. / Reich, H. / Völk, H.-G. / Fick, D. et al. | 1989
    355
    Evidence for a bound state of the Σ 4 He hypernucleus
    Hayano, R.S. / Ishikawa, T. / Iwasaki, M. / Outa, H. / Takada, E. / Tamura, H. / Sakaguchi, A. / Aoki, M. / Yamazaki, T. et al. | 1989
    359
    Measurements of d σ d E t in collisions of light nuclei at S nn =31.5 GeV
    Åkesson, T. / Albrow, M.G. / Almehed, S. / Benary, O. / Bøggild, H. / Botner, O. / Breuker, H. / Callen, B. / Carter, A.A. / Carter, J.R. et al. | 1989
    365
    Spin structure of the Δ excitation
    Ellegaard, C. / Gaarde, C. / Jørgensen, T.S. / Larsen, J.S. / Million, B. / Goodman, C. / Brockstedt, A. / Ekström, P. / Österlund, M. / Bedjidian, M. et al. | 1989
    370
    Superstring models from the second realization of Yau's three-generation manifold
    Panagiotakopoulos, C. et al. | 1989
    377
    The off-shell closed strings as topological open membranes. Dynamical transmutation of world sheet dimension
    Kogan, Yan I. et al. | 1989
    383
    A superconformal algebra of meromorphic vector fields with three poles on the super Riemann sphere
    Wang, Shi-Kun / Xu, Kai-Wen et al. | 1989
    389
    Open strings and the relative modular group
    Bianchi, Massimo / Sagnotti, Augusto et al. | 1989
    397
    Effects of the first string massive level states on the renormalization of low-energy gauge coupling constants
    Katehou, E.K. et al. | 1989
    403
    Off-shell Ward identities and gauge symmetries in string theory
    Porrati, Massimo et al. | 1989
    408
    A note on some non-linear covariant gauges in Yang-Mills theory
    Delduc, F. / Sorella, S.P. et al. | 1989
    411
    Free field representation of minimal models on a Riemann surface
    Felder, G. / Silvotti, R. et al. | 1989
    417
    Duality symmetries in N = 2 Landau-Ginzburg models
    Lerche, W. / Lüst, D. / Warner, N.P. et al. | 1989
    425
    Bosonization of twisted parafermions and application
    Sochen, Nir et al. | 1989
    429
    Stable superconducting cosmic strings
    Allen, T.J. et al. | 1989
    433
    Stability of charged boson stars
    Jetzer, Ph. et al. | 1989
    439
    Mirror neutrinos in supernovae
    Maalampi, J. / Peltoniemi, J.T. et al. | 1989
    444
    Ground state of high-density matter at finite temperature
    Roulet, Esteban / Tommasini, Daniele et al. | 1989
    449
    Spontaneous breaking of parity in quenched lattice QCD with Wilson fermions
    Aoki, Sinya / Gocksch, Andreas et al. | 1989
    453
    Quark confinement with dynamical fermions in higher representations
    Gerstenmayer, E. / Faber, M. / Feilmair, W. / Markum, H. / Müller, M. et al. | 1989
    458
    The interplay between the top quark mass and the structure of the higgs system
    Passarino, Giampiero et al. | 1989
    463
    Chiral-symmetry breaking in QCD at finite temperature and density
    Barducci, A. / Casalbuoni, R. / De Curtis, S. / Gatto, R. / Pettini, G. et al. | 1989
    471
    How strange is the proton spin?
    Stern, Jacqueline / Clément, Gérard et al. | 1989
    477
    Quark-quark correlations and the λI= 1 2 rule
    Neubert, Matthias / Stech, Berthold et al. | 1989
    483
    Can the Bjorken sum rule outlive that of Ellis and Jaffe?
    Preparata, Giuliano / Ratcliffe, Philip / Soffer, Jacques et al. | 1988
    487
    Transverse degrees of freedom in QED evolution
    Nicrosini, O. / Trentadue, L. et al. | 1989
    492
    Higher order QED corrections to forward-backward asymmetry
    Montagna, G. / Nicrosini, O. / Trentadue, L. et al. | 1989
    497
    On the polarization of gluons in the proton
    Ellis, John / Karliner, Marek / Sachrajda, C.T. et al. | 1989
    503
    Limits on mirror leptons in ep collisions
    Csikor, F. / Montvay, I. et al. | 1989
    509
    A determination of the properties of the neutral intermediate vector boson Z0
    Adeva, B. / Adriani, O. / Aguilar-Benitez, M. / Akbari, H. / Alcaraz, J. / Aloisio, A. / Alviggi, M.G. / An, Q. / Anderhub, H. / Andersson, A.L. et al. | 1989
    519
    Determination of the number of light neutrino species
    DeCamp, D. / Deschizeaux, B. / Lees, J.-P. / Minard, M.-N. / Crespo, J.M. / Delfino, M. / Fernandez, E. / Martinez, M. / Miquel, R. / Mir, M.L. et al. | 1989
    530
    Measurement of the Z0 mass and width with the opal detector at LEP
    Akrawy, M.Z. / Alexander, G. / Allison, J. / Allport, P.P. / Anderson, K.J. / Armitage, J.C. / Arnison, G.T.J. / Ashton, P. / Azuelos, G. / Baines, J.T.M. et al. | 1989
    539
    Measurement of the mass and width of the Z0-particle from multihadronic final states produced in e+e− annihilations
    Aarnio, P. / Abreu, P. / Adam, W. / Adrianos, P. / Adye, T. / Akopdzhanov, G. / Alekseev, G. / Allaby, J. / Allen, P. / Allport, P. et al. | 1989
    548
    Study of intermittency in electron-positron annihilation into hadrons
    Braunschweig, W. / Gerhards, R. / Kirschfink, F.J. / Martyn, H.-U. / Fischer, H.M. / Hartmann, H. / Hartmann, J. / Hilger, E. / Jocksch, A. / Wedemeyer, R. et al. | 1989
    557
    Measurement of the φφ cross section in p p annihilations at ECM≈3 GeV
    Baglin, C. / Baird, S. / Bassompierre, G. / Bino, C. / Borreani, G. / Brient, J.-C. / Brom, J.M. / Bugge, L. / Buran, T. / Burq, J.-P. et al. | 1989
    563
    Erratum
    | 1989
    564
    Author index to volume 231
    | 1989

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