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Transport analysis of K+ production in proton-nucleus reactions

Z. Rudy·W. Cassing·L. Jarczyk·B. Kamys·A. Kowalczyk·P. Kulessa
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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 $(NN\to N Y K^+$) and two-step $Δ$-nucleon $(ΔN \to K^+ Y N$) or pion-nucleon $(πN \to K^+ Y $) production channels on the basis of a coupled-channel transport approach (CBUU) 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 $^{12}C$, $^{63}Cu$, $^{107}Ag$ and $^{197}Au$ targets as well as their momentum differential ratios gives a repulsive $K^+$ potential of $20\pm 5 $ MeV at normal nuclear matter density.

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Z. Rudy, W. Cassing, L. Jarczyk, B. Kamys, A. Kowalczyk, P. Kulessa. 2004-11-02. Transport analysis of K+ production in proton-nucleus reactions. https://doi.org/10.1140/epja%2Fi2004-10108-7

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