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Inclusive cross section ratios in highp T proton-proton scattering at ISR energies

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Zeitschrift für Physik C Particles and Fields

Abstract

Ratios of inclusive cross sections σ(π+)/σ(π++K ++p) and\(\sigma (\pi ^ - )/\sigma (\pi ^ - + K^ - + \bar p)\) were measured for proton-proton interactions with a highp T hadron in the final state around c.m.s. scattering angles θ≅20°, 20° and 45° at two ISR energies\(\sqrt s = 31\) Gev and 62 GeV. Results are shown as functions of transverse and longitudinal momentum and are compared with parton model predictions. The different dependences of positive and negative pion fractions atp T ≅2–3 GeV/c on longitudinal momenta is similar to that observed in soft hadronic interactions at low values ofp T where the leading proton effect (diquark fragmentation) is known to contribute. The quantitative agreement of the data with diquark model predictions indicates the presence of diquark fragmentation also in highp T jets.

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Author notes

  1. A. Breakstone

    Present address: University of Hawaii, USA

  2. H. Frehse

    Present address: CDC, Zürich, Switzerland

  3. W. Geist & M. Heiden

    Present address: LBL, Berkeley, California, USA

  4. H. Flöge, W. Herr & A. Putzer

    Present address: CERN, Geneva, Switzerland

  5. T. Nakada

    Present address: SIN, Villigen, Switzerland

  6. M. Panter

    Present address: University of Karlsruhe, FRG

  7. G. P. Siroli

    Present address: University of Maryland, USA

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

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

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

    R. Mankel, K. Rauschnabel, M. Schmelling & 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, 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. Frehse
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  13. W. Geist
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  14. H. Flöge
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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. E. E. Kluge
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  25. J. W. Lamsa
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  26. T. Lohse
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  27. R. Mankel
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  28. W. T. Meyer
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  29. T. Nakada
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  30. M. Panter
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  31. A. Putzer
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  32. K. Rauschnabel
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  33. B. Rensch
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  34. F. Rimondi
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  35. M. Schmelling
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  36. G. P. Siroli
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  37. R. Sosnowski
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  38. M. Szczekowski
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  39. O. Ullaland
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  40. D. Wegener
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  41. R. Yeung
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Breakstone, A., Campanini, R., Crawley, H.B. et al. Inclusive cross section ratios in highp T proton-proton scattering at ISR energies. Z. Phys. C - Particles and Fields 35, 159–166 (1987). https://doi.org/10.1007/BF01408444

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  • DOI: https://doi.org/10.1007/BF01408444

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