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Tagging diquarks by protons of high transverse momentum inpp collisions at the ISR

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Zeitschrift für Physik C Particles and Fields

Abstract

Events are analyzed in which a high transverse momentum proton was produced at polar angles of 10°, 20° and 45°. The experiment was performed with the Split Field Magnet detector at the CERN ISR at\(\sqrt s \)=62 GeV. A 4-jet structure of these events is found [1]. The measured charge structure of spectator jets is compatible with proton production from hard diquark scattering. This is supported by a study of baryon number compensation in the towards jets. The observed charge compensation in the towards jets suggests dominance of hard (ud) scattering. Evidence forΔ ++ production at high transverse momentum indicates the presence of an additional (uu) scattering component. The properties of the recoiling away jets are compatible with the fragmentation of a valence quark and/or of a gluon as in the case of meson triggers.

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Author notes

  1. A. Breakstone

    Present address: Dept. of Physics, University of Hawaii, USA

  2. H. Freshe

    Present address: CDC, Zürich, Switzerland

  3. W. M. Geist & M. Heiden

    Present address: LBL, Berkeley, CA, USA

  4. W. Herr

    Present address: CERN, Geneva, Switzerland

  5. T. Nakada

    Present address: SIN, Villigen, Switzerland

  6. M. Panter

    Present address: University of Heidelberg, Heidelberg, Germany

  7. C. Stubenrauch

    Present address: , Saclay, France

  8. R. Yeung

    Present address: University of California, Los Angeles, USA

Authors and Affiliations

  1. Ames laboratory and Physics Department, Iowa State University, 50011, Ames, IA, USA

    A. Breakstone, H. B. Crawley, A. Firestone, M. Gorbics, D. Isenhower, J. W. Lamsa & W. T. Meyer

  2. Dipartimento di Fisica dell'Università and INFN, I-40126, Bologna, Italy

    R. Campanini, M. Cuffiani, M. M. Deninno, F. Fabbri, G. Giacomelli, F. Rimondi & G. P. Siroli

  3. CERN, European Organization for Nuclear Research, CH-1211, Geneva 23, Switzerland

    G. M. Dallavalle, D. Drijard, H. G. Fischer, H. Freshe, W. M. Geist, M. Heiden, T. Lohse, M. Panter, O. Ullaland & R. Yeung

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

    S. Kersting, R. Mankel, K. Rauschnabel, M. Schmelling, C. Stubenrauch & D. Wegener

  5. Institut für Hochenergiephysik der Universität, D-6900, Heidelberg, Federal Republic of Germany

    H. Flöge, L. Gesswein, P. Hanke, W. Herr, E. E. Kluge, T. Nakada, A. Putzer & B. Rensch

  6. University and Institute for Nuclear Studies, PL-00681, Warsaw, Poland

    K. Doroba, R. Gokieli, M. Gorski, R. Sosnowski & M. Szczekowski

Authors
  1. A. Breakstone
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  2. R. Campanini
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  3. H. B. Crawley
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  4. M. Cuffiani
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  5. G. M. Dallavalle
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  6. M. M. Deninno
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  7. K. Doroba
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  8. D. Drijard
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  9. F. Fabbri
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  10. A. Firestone
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  11. H. G. Fischer
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  12. H. Flöge
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  13. H. Freshe
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  14. W. M. Geist
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  15. L. Gesswein
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  16. G. Giacomelli
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  17. R. Gokieli
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  18. M. Gorbics
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  19. M. Gorski
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  20. P. Hanke
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  21. M. Heiden
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  22. W. Herr
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  23. D. Isenhower
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  24. S. Kersting
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  25. E. E. Kluge
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  26. J. W. Lamsa
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  27. T. Lohse
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  28. R. Mankel
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  29. W. T. Meyer
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  30. T. Nakada
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  31. M. Panter
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  32. A. Putzer
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  33. K. Rauschnabel
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  34. B. Rensch
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  35. F. Rimondi
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  36. M. Schmelling
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  37. G. P. Siroli
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  38. R. Sosnowski
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  39. C. Stubenrauch
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  40. M. Szczekowski
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  41. O. Ullaland
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  42. D. Wegener
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  43. R. Yeung
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Breakstone, A., Campanini, R., Crawley, H.B. et al. Tagging diquarks by protons of high transverse momentum inpp collisions at the ISR. Z. Phys. C - Particles and Fields 36, 567–576 (1987). https://doi.org/10.1007/BF01630594

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  • DOI: https://doi.org/10.1007/BF01630594

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