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Strange baryon production ine + e − annihilation

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Zeitschrift für Physik C Particles and Fields

Abstract

The production of strange baryons ine + e − annihilation has been studied at centre of mass energies of 34.8 GeV and 42.1 GeV, using the TASSO detector at DESY. Inclusive cross-sections have been obtained forΛ 0 andΞ − production and an upper limit has been placed upon the production rate of Σ*±(1385). We measure theΛ 0 multiplicity per event to be\(\begin{gathered} \hfill \\ 0.218_{ - 0.011}^{ + 0.011} \pm 0.021 \hfill \\ \end{gathered} \) and\(0.256_{ - 0.029}^{ + 0.030} \pm 0.025\) at\(\sqrt s = 34.8\) and 42.1 GeV respectively. The Ξ− multiplicity per event is found to be\(0.014_{ - 0.003}^{ + 0.003} \pm 0.004\) at\(\sqrt s = 34.8 GeV\). An investigation has been made of the extent to whichΛ 0 are produced in pairs. TheΛ 0 cross-section has been studied as a function of event sphericity.

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Author notes

  1. B. Bock

    Present address: Krupp Atlas Elektr. GmbH, Bremen, FRG

  2. E. Bernardi

    Present address: Robert Bosch GmbH, Schwieberdingen, FRG

  3. J. Chwastowski & A. Eskreys

    Present address: Inst. of Nuclear Physics, Cracow, Poland

  4. K. Genser, J. M. Pawlak & R. Walczak

    Present address: Warsaw University, Poland

  5. P. Mattig

    Present address: IPP Canada, Carleton University, Ottawa, Canada

  6. T. Kracht

    Present address: Hasylab, DESY, Hamburg, FRG

  7. W. Zeuner

    Present address: CERN, CH-1211, Geneva 23, Switzerland

  8. D. Su & P. N. Burrows

    Present address: RAL, Chilton, OX11 0QX, Didcot, Oxon, UK

  9. I. R. Tomalin

    Present address: Dept. of Physcis, Imperial College, London SW7 2AZ, UK

  10. J. M. Yelton

    Present address: University of Florida, 32611, Gainesville, Florida, USA

  11. G. E. Forden

    Present address: SUNY Stony Brook, Stony Brook, NY, USA

  12. L. Labarga

    Present address: SLAC, Stanford, CA, USA

  13. D. Strom

    Present address: University of Chicago, Chicago, IL, USA

Authors and Affiliations

  1. Physikalisches Institut der RWTH Aachen, D-5100, Aachen, Federal Republic of Germany

    W. Braunschweig, R. Gerhards, F. J. Kirschfink & H. -U. Martyn

  2. Physikalisches Institut der Universität Bonn, D-5300, Bonn, Federal Republic of Germany

    B. Bock, H. M. Fischer, H. Hartmann, J. Hartmann, E. Hilger, A. Jocksch & R. Wedemeyer

  3. H.H. Wills Physics Laboratory, University of Bristol, BS8 1TL, Bristol, UK

    B. Foster, A. J. Martin & A. J. Sephton

  4. Dentsches Elektronen-Synchrotron, DESY, D-2000, Hamburg, Federal Republic of Germany

    E. Bernardi, J. Chwastowski, A. Eskreys, K. Gather, K. Genser, H. Hultschig, P. Joos, H. Kowalski, A. Ladage, B. Löhr, D. Lüke, P. Mattig, D. Notz, J. M. Pawlak, K. -U. Posnecker, E. Ros, W. Schütte, D. Trines, R. Walczak & G. Wolf

  5. Institut für Physik, Universität Dortmund, D-4600, Dortmund, Federal Republic of Germany

    H. Kolanoski

  6. II. Institut für Experimentalphysik der Universität Hamburg, 2000, Hamburg, Federal Republic of Germany

    T. Kracht, J. Krüger, E. Lohrmann, G. Poelz & W. Zeuner

  7. Department of Physics, Imperial College, SW7 2AZ, London, UK

    D. M. Binnie, J. Hassard, J. Shulman & D. Su

  8. Universidad Autonoma de Madrid, Madrid, Spain

    F. Barreiro, A. Leites, L. Hervas, J. del Peso & M. Traseira

  9. Department of Nuclear Physics, Oxford University, OX1 3RH, Oxford, UK

    C. Balkwill, M. G. Bowler, P. N. Burrows, R. J. Cashmore, G. P. Heath, P. N. Ratoff, I. M. Silvester, I. R. Tomalin, M. E. Veitch & J. M. Yelton

  10. Department of Physics, Queen Mary College, E1 4NS, London, UK

    S. L. Lloyd

  11. Rutherford Appleton Laboratory, Chilton, OX11 0QX, Didcot, Oxon, UK

    G. E. Forden, J. C. Hart & D. H. Saxon

  12. Fachbereich Physik der Universität-Gesamthochschule Siegen, D-5900, Siegen, Federal Republic of Germany

    S. Brandt, M. Holder & L. Labarga

  13. Weizmann Institute, Rehovot, 76100, Israel

    Y. Eisenberg, U. Karshon, G. Mikenberg, A. Montag, D. Revel, E. Ronat, A. Shapira, N. Wainer & G. Yekutieli

  14. Department of Physics, University of Wisconsin, 53706, Madison, WI, USA

    D. Muller, S. Ritz, D. Strom, M. Takashima, Sau Lan Wu & G. Zobernig

Authors
  1. W. Braunschweig
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  2. R. Gerhards
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  3. F. J. Kirschfink
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  4. H. -U. Martyn
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  6. H. M. Fischer
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  8. J. Hartmann
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  9. E. Hilger
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  10. A. Jocksch
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  11. R. Wedemeyer
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  12. B. Foster
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  28. J. M. Pawlak
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  46. A. Leites
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  47. L. Hervas
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  76. D. Muller
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  77. S. Ritz
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  78. D. Strom
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  79. M. Takashima
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  80. Sau Lan Wu
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  81. G. Zobernig
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TASSO Collaboration

Additional information

Supported by the Bundesministerium für Forschung und Technologie

Supported by the UK Science and Engineering Research Council

Supported by CAICYT

Supported by the Minerva Gesellschaft für Forschung mbH

Supported by the US Dept. of Energy, contract DE-AC02-76ER00881 and by the U.S. National Science Foundation Grant no. INT-8313994 for travel

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TASSO Collaboration., Braunschweig, W., Gerhards, R. et al. Strange baryon production ine + e − annihilation. Z. Phys. C - Particles and Fields 45, 209–222 (1989). https://doi.org/10.1007/BF01674451

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  • DOI: https://doi.org/10.1007/BF01674451

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