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Observation of K+d correlations from pA collisions

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Abstract:

Results of a first experiment on (K+p) and (K+d) correlations from proton-carbon (pC) and proton-deuteron (pd) interactions at beam energies above and much below the threshold for elementary kaon production in nucleon-nucleon reactions ( T NN = 1580 MeV) are discussed. These data, obtained with the ANKE spectrometer at COSY-Jülich, provide first direct evidence for K+ production via the two-step mechanism and an indication for a cluster mechanism. It is shown that both processes contribute significantly in pC collisions at 1200 MeV, while they are strongly suppressed at 2300 MeV and also in pd-interactions at 1344 MeV. It is emphasized that the underlying kinematics can be exploited to distinguish between these reaction mechanisms.

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Authors and Affiliations

  1. High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia, , , , , , RU

    V. Koptev, M. Nekipelov & S. Mikirtichyants

  2. Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany, , , , , , DE

    M. Büscher, S. Dymov, M. Hartmann, V. Hejny, H.R. Koch, H. Ohm, Z. Rudy, R. Schleichert, A. Sibirtsev, K. Sistemich, H. Ströher & K.-H. Watzlawik

  3. Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia, , , , , , RU

    A. Petrus

  4. Institut für Kernphysik, Universität Münster, W.-Klemm-Str. 9, D-48149 Münster, Germany, , , , , , DE

    N. Lang

Authors
  1. V. Koptev
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  2. M. Nekipelov
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  3. M. Büscher
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  4. S. Dymov
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  5. M. Hartmann
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  6. V. Hejny
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  7. H.R. Koch
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  8. N. Lang
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  9. S. Mikirtichyants
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  10. H. Ohm
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  11. A. Petrus
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  12. Z. Rudy
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  13. R. Schleichert
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  14. A. Sibirtsev
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  15. K. Sistemich
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  16. H. Ströher
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  17. K.-H. Watzlawik
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Additional information

Received: 26 November 2002 / Accepted: 26 March 2003 / Published online: 20 May 2003

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Koptev, V., Nekipelov, M., Büscher, M. et al. Observation of K+d correlations from pA collisions. Eur Phys J A 17, 235–240 (2003). https://doi.org/10.1140/epja/i2002-10158-9

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  • DOI: https://doi.org/10.1140/epja/i2002-10158-9

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