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Transport analysis of K+ production in proton-nucleus reactions

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Abstract.

The production of K+-mesons in proton-nucleus collisions from 1.0 to 2.3 GeV is analyzed with respect to one-step nucleon-nucleon (NN → NYK+) and two-step Δ-nucleon (ΔN → K+YN) or pion-nucleon (πN → K+Y) production channels on the basis of a coupled-channel (CBUU) transport approach including the kaon final-state-interactions (FSI). Momentum-dependent potentials for the nucleon, hyperon and kaon in the final state are included as well as K+ elastic rescattering in the target nucleus. The transport calculations are compared to the experimental K+ spectra taken at COSY-Jülich. Our systematic analysis of K+ spectra from 12C, 63Cu, 107Ag and 197Au targets as well as their momentum differential ratios gives a repulsive K+ potential of 20±5 MeV at normal nuclear matter density.

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Authors and Affiliations

  1. M. Smoluchowski Institute of Physics, Jagellonian University, PL-30059, Cracow, Poland

    Z. Rudy, L. Jarczyk, B. Kamys & A. Kowalczyk

  2. Institut für Theoretische Physik, Justus Liebig Universität Giessen, D-35392, Giessen, Germany

    W. Cassing & A. Kowalczyk

  3. W. Niewodniczański Institute of Nuclear Physics, PL-31342, Cracow, Poland

    P. Kulessa

Authors
  1. Z. Rudy
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  2. W. Cassing
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  3. L. Jarczyk
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  4. B. Kamys
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  5. A. Kowalczyk
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  6. P. Kulessa
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Correspondence to W. Cassing.

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V.V. Anisovich

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Rudy, Z., Cassing, W., Jarczyk, L. et al. Transport analysis of K+ production in proton-nucleus reactions. Eur. Phys. J. A 23, 379–385 (2005). https://doi.org/10.1140/epja/i2004-10108-7

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  • DOI: https://doi.org/10.1140/epja/i2004-10108-7

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