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Collective characteristics of hadron systems produced in beam fragmentation of π+ p collisions at 250 GeV/c

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Zeitschrift für Physik C Particles and Fields

Abstract

Collective characteristics are studied of hadrons produced in beam fragmentation of non-single-diffractive π+ p-interactions at 250 GeV/c. An attempt is made to obtain experimental information on the properties of leading cluster production and fragmentation. On average, the leading cluster carries 0.8±0.1 of the incident momentum, so that the mean value of the inelasticity coefficient of 〈k〉=0.2±0.1 is significantly smaller than that deduced from leading single hadron spectra. The momentum transfer distribution shows that nonsingle-diffractive processes are less peripheral than diffraction dissociation. The analysis of thrust and sphericity shows jet-like structure of pion fragmentation, that of the charge flow an average forward charge of 〈Q f 〉=0.45±0.04, in agreement with the average charge of the beam valence quarks. Our data are compared to diffraction dissociation and to the Fritiof model.

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Author notes

  1. A. De Roeck

    Present address: MPI, Munich, Germany

  2. E. A. De Wolf

    Present address: Bevoegdverklaard Navorser NFWO, Belgium

  3. P. van Hal

    Present address: Ericsson Telecommunicatie B.V., Rijen, The Netherlands

  4. T. Haupt

    Present address: University of Syracuse, Syracuse, NY, USA

  5. F. Meijers

    Present address: CERN, Geneva, Switzerland

  6. L. Scholten

    Present address: PANDATA, Rijswijk, The Netherlands

Authors and Affiliations

  1. Universitaire Instelling Antwerpen, B-2610, Wilrijk

    A. De Roeck, E. A. De Wolf, A. B. Michałowska & F. Verbeure

  2. VUB/ULB, Inter-University Institute for High Energies, B-1050, Brussels, Belgium

    A. De Roeck, E. A. De Wolf, A. B. Michałowska & F. Verbeure

  3. Institut für Hochenergiephysik, O-1615, Berlin-Zeuthen, Federal Republic of Germany

    H. Böttcher & R. Wischnewski

  4. Department of High Energy Physics, Helsinki University, SF-00170, Helsinki, Finland

    H. Saarikko

  5. Institute of Physics and Nuclear Techniques of the Academy of Mining and Metallurgy and Institute of Nuclear Physics, PL-30055, Krakow, Poland

    K. Dziunikovska, D. Kisielewska & K. Olkiewicz

  6. Moscow State University, SU-117234, Moscow, USSR

    P. F. Ermolov, Y. A. Golubkov, E. K. Shabalina & S. A. Zotkin

  7. University of Nijmegen and NIKHEF-H, NL-6525 ED, Nijmegen, The Netherlands

    F. Botterweck, F. Crijns, P. van Hal, T. Haupt, W. Kittel, F. Meijers & L. Scholten

  8. Centro Brasileiro de Pesquisas Fisicas, 22290, Rio de Janeiro, Brazil

    A. M. F. Endler

  9. Institute for High Energy Physics, SU-142284, Serpukhov, USSR

    I. V. Ajinenko, L. P. Petrovikh & A. M. Rybin

  10. Institute of High Energy Physics of Tbilisi State University, SU-380086, Tbilisi, USSR

    Z. C. Garutchava

  11. University of Warsaw and Institute of Nuclear Problems, PL-00681, Warsaw, Poland

    H. Białkowska

  12. Institute of Physics, SU-375036, Yerevan, USSR

    N. G. Grigoryan, G. R. Gulkanyan, J. K. Karamyan, Z. A. Kirakosyan & S. S. Megrabyan

Authors
  1. I. V. Ajinenko
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  2. H. Białkowska
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  3. H. Böttcher
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  4. F. Botterweck
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  5. F. Crijns
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  6. A. De Roeck
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  7. E. A. De Wolf
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  8. K. Dziunikovska
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  9. A. M. F. Endler
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  10. P. F. Ermolov
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  11. Z. C. Garutchava
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  12. Y. A. Golubkov
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  13. N. G. Grigoryan
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  14. G. R. Gulkanyan
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  15. P. van Hal
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  16. T. Haupt
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  17. J. K. Karamyan
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  18. Z. A. Kirakosyan
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  19. D. Kisielewska
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  20. W. Kittel
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  21. S. S. Megrabyan
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  22. F. Meijers
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  23. A. B. Michałowska
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  24. K. Olkiewicz
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  25. L. P. Petrovikh
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  26. A. M. Rybin
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  27. H. Saarikko
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  28. L. Scholten
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  29. E. K. Shabalina
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  30. F. Verbeure
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  31. R. Wischnewski
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  32. S. A. Zotkin
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Consortia

EHS/NA22 Collaboration

Additional information

Partially supported by grants from CPBP 01.06 and 01.09

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EHS/NA22 Collaboration., Ajinenko, I.V., Białkowska, H. et al. Collective characteristics of hadron systems produced in beam fragmentation of π+ p collisions at 250 GeV/c. Z. Phys. C - Particles and Fields 49, 367–374 (1991). https://doi.org/10.1007/BF01549688

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  • DOI: https://doi.org/10.1007/BF01549688

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