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    Tests of quantum chromodynamics and a direct measurement of the strong coupling constant α s at √s=30 GeV (English)

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    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; 89 , 1 ; 139-144  ; 1979
    • ISSN:
      0370-2693
    • Article (Journal)  /  Electronic Resource

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    Abstract We report the measurement of the reaction e+ + e− → hadronic jets at a center-of-mass energy √s=30 GeV using the MARK-J detector at PETRA. By measuring the energy and angular distribution of both neutrals and charged particles we were able to isolate unambiguously the three-jet events in a kinematic region where the backgrounds from q q and phase space contributions and other processes are small. Various comparisons of the data with quantum chromodynamics were made. The relative yield of three-jet events and the shape distribution of the events enable us to determine α s = 0.23 ± 0.02 (statistical error) with a systematic error of ± 0.04.

    Table of contents – Volume 89, Issue 1

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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.

    1
    A calculation of low-lying collective states in even-even nuclei
    Iachello, F. / Puddu, G. / Scholten, O. / Arima, A. / Otsuka, T. et al. | 1979
    5
    A possible connection between the attenuations of the Coriolis interaction and the recoil term
    NeergÅrd, Kai et al. | 1979
    8
    The recoil term and the pairing interaction
    Engeland, T. / Rekstad, J. et al. | 1979
    11
    Fission: Adiabatic? Non-adiabatic!
    Schütte, G. et al. | 1979
    13
    Evidence for pion exchange currents in the analysis of the 4He (p, d)3He reaction at intermediate energies
    Shepard, J.R. / Rost, E. / Smith, G.R. et al. | 1979
    17
    The short-range nucleon-nucleon interaction from nonrelativistic quantum chromodynamics
    Warke, C.S. / Shanker, R. et al. | 1979
    22
    The continuous spectrum and the excitation of giant resonances in the reaction 16O + 208Pb
    Broglia, R.A. / Pollarolo, G. / Vitturi, A. / Winther, A. / Dasso, C.H. / Esbensen, H. et al. | 1979
    26
    Angular distributions for the 12C(K−,π−)12 ΛC reaction
    Dover, C.B. / Gal, A. / Walker, G.E. / Dalitz, R.H. et al. | 1979
    31
    States of 12 ΛC formed in the reaction 12 C ( K −, π−)
    Chrien, R.E. / May, M. / Palevsky, H. / Sutter, R. / Barnes, P. / Dytman, S. / Marlow, D. / Takeutchi, F. / Deutsch, M. / Cester, R. et al. | 1979
    36
    Experimental resolution of the 145Gd ϵ/β-decay branching ratio anomalies
    Firestone, R.B. / Pardo, R.C. / McHarris, Wm.C. et al. | 1979
    40
    65 MeV polarized proton elastic scattering and the effective two-body interaction range
    Sakaguchi, H. / Nakamura, M. / Hatanaka, K. / Goto, A. / Noro, T. / Ohtani, F. / Sakamoto, H. / Kobayashi, S. et al. | 1979
    44
    High-energy electron scattering on 6Li and 12C as an incoherent superposition of single-nucleon processes
    Glawe, U. / Stronbusch, U. / Franz, J. / Grosse-Wiesmann, P. / Guzielski, G. / Huber, G. / Mecklenbrauck, G. / Mecklenbrauck, W. / Rössle, E. et al. | 1979
    48
    Systematics of back angle 12C scattering — the 12C + 20Ne and 12C + 24Mg systems
    Ford, J.L.C. Jr. / Gomez del Campo, J. / Shapira, D. / Clover, M.R. / DeVries, R.M. / Fulton, B.R. / Ost, R. / Maguire, C.F. et al. | 1979
    52
    An example of the no-hair conjecture in supergravity
    Urrutia, L.F. et al. | 1979
    57
    High-temperature behavior of gauge theories
    Mohapatra, Rabindra N. / Senjanović, Goran et al. | 1979
    61
    Infrared problem and spontaneous breaking of the Lorentz group in QED
    Fröhlich, J. / Morchio, G. / Strocchi, F. et al. | 1979
    65
    Hadron spectroscopy with covariant Coulomb and confining interactions
    Mitra, A.N. et al. | 1979
    69
    How to regularize the infrared and mass singularities in QCD
    Humpert, B. / van Neerven, W.L. et al. | 1979
    76
    Lax pairs for certain generalizations of the sine-Gordon equation
    Eichenherr, H. / Pohlmeyer, K. et al. | 1979
    79
    Isospin-violating mixing in meson nonets
    Isgur, Nathan / Rubinstein, H.R. / Schwimmer, A. / Lipkin, H.J. et al. | 1979
    84
    Crossing relations for deep-inelastic and annihilation processes
    Baulieu, L. / Floratos, E.G. / Kounnas, C. et al. | 1979
    89
    A comparison of average transverse momenta measured in deep inelastic scattering and in electron-positron annihilation
    Odorico, R. et al. | 1979
    95
    Parity violation in high energy Lepton pair production and QCD
    Callaway, D.J.E. / Ellis, S.D. / Henley, E.M. / Hwang, W.-Y.P. et al. | 1979
    99
    The needle in the large p T haystack: Higgs versus quark or gluon jets together with Z0 in hadronic reactions
    Finjord, J. / Girardi, G. / Sorba, P. et al. | 1979
    105
    Quark and particle helicities in hadronic charmed particle decays
    Körner, J.G. / Goldstein, Gary R. et al. | 1979
    111
    D-meson lifetimes and decays
    Guberina, B. / Nussinov, S. / Peccei, R.D. / Rückl, R. et al. | 1979
    116
    P-wave radial mixing in mesons
    Bradley, A. et al. | 1979
    120
    Hadron production from photon-photon interactions in the CM energy range from 1 to 5 GeV
    Berger, Ch. / Genzel, H. / Grigull, R. / Lackas, W. / Raupach, F. / Klovning, A. / Lillestöl, E. / Lillethun, E. / Skard, J.A. / Ackermann, H. et al. | 1979
    125
    Observation of a narrow hyperon state of mass 3.17 GeV
    Amirzadeh, J. / Ansorge, R.E. / Baubillier, M. / Bloodworth, I.J. / Bossen, G.J. / Burns, A. / Carney, J.N. / Carter, J.R. / Cowan, C.A. / Cox, G.F. et al. | 1979
    131
    Evidence for the Bφ decay mode of the ω(1670)
    Baubillier, M. / Bloodworth, I.J. / Bossen, G.J. / Burns, A. / Carney, J.N. / Cowan, C.A. / Cox, G.F. / Dore, U. / Gavillet, Ph. / Kinson, J.B. et al. | 1979
    136
    Search for new flavour production at PETRA
    Bartel, W. / Canzler, T. / Cords, D. / Dittmann, P. / Eichler, R. / Felst, R. / Haidt, D. / Kawabata, S. / Krehbiel, H. / Naroska, B. et al. | 1979
    139
    Tests of quantum chromodynamics and a direct measurement of the strong coupling constant α s at √s=30 GeV
    Barber, D.P. / Becker, U. / Benda, H. / Boehm, A. / Branson, J.G. / Bron, J. / Buikman, D. / Burger, J. / Chang, C.C. / Chen, H.S. et al. | 1979
    145
    Experimental cross section for dimuon production and the Drell-Yan model
    Badier, J. / Boucrot, J. / Burgun, G. / Callot, O. / Charpentier, Ph. / Crozon, M. / Décamp, D. / Delpierre, P. / Gandois, B. / Hagelberg, R. et al. | 1979
    151
    Alpha transfer at sub-coulomb energies in the 9Be + 16O reaction
    C̆ujec, Bibiana / Wu, Shiu-Chin / Barnes, Charles A. et al. | 1979
    155
    Baryon production by primordial black holes
    Turner, Michael S. et al. | 1979
    160
    Creation of particles by time-dependent gravitational fields
    Castagnino, Mario / Weder, Ricardo et al. | 1979
    iii
    Editorial Board
    | 1979

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