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Inclusive K+-meson production in proton-nucleus interactions

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Abstract.

The production of K+-mesons in pA (A = D, C, Cu, Ag, Au) collisions has been investigated at the COoler SYnchrotron COSY-Jülich for beam energies Tp = 1.0-2.3 GeV. Double differential inclusive pC cross-sections at forward angles ϑ{K^+} < 12° as well as the target mass dependence of the K+ momentum spectra have been measured with the ANKE spectrometer. Far below the free NN threshold at TNN = 1.58 GeV the spectra reveal a high degree of collectivity in the target nucleus. From the target mass dependence of the cross-sections at higher energies, the repulsive in-medium potential of the K+-mesons can be deduced. Using pN cross-section parameterisations from the literature and our measured pD data we derive a cross-section ratio σ(pn↦K+X)/σ(pp↦K+X) ∼ (3-4).

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Authors and Affiliations

  1. Institut für Kernphysik, Forschungszentrum Jülich, 52425, Jülich, Germany

    M. Büscher, M. Nekipelov, H. Ströher, Yu. Valdau, M. Hartmann, V. Hejny, I. Lehmann & H. Ohm

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

    V. Koptev, M. Nekipelov, Yu. Valdau, S. Barsov & S. Mikirtychiants

  3. Institute of Physics, Jagellonian University, Reymonta 4, 30059, Cracow, Poland

    Z. Rudy

  4. Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, 50937, Köln, Germany

    V. Kleber

  5. Institut für Kernphysik, Universität Münster, W.-Klemm-Str. 9, 48149, Münster, Germany

    N. Lang

  6. Institut für Hadronen- und Kernphysik, Forschungszentrum Rossendorf, D-01474, Dresden, Germany

    I. Lehmann

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  1. M. Büscher
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  2. V. Koptev
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  3. M. Nekipelov
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  7. S. Barsov
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  8. M. Hartmann
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  9. V. Hejny
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  13. S. Mikirtychiants
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  14. H. Ohm
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Büscher, M., Koptev, V., Nekipelov, M. et al. Inclusive K+-meson production in proton-nucleus interactions. Eur. Phys. J. A 22, 301–317 (2004). https://doi.org/10.1140/epja/i2004-10036-6

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  • DOI: https://doi.org/10.1140/epja/i2004-10036-6

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