Transport analysis of K+ production in proton-nucleus reactions

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 $(NN\to NY{K}^{+}$) and two-step $\Delta$-nucleon $(\Delta N\to K^{+}YN$) or pion-nucleon $(\pi N\to K^{+}Y$) 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.

arXiv comment7 pages, 5 figures, submitted to Eur. Phys. J. A

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• In-Medium Effects on K0 Mesons in Relativistic Heavy-Ion Collisions
• Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c
• Kaon production and propagation at intermediate relativistic energies
• Subthreshold and near-threshold kaon and antikaon production in proton-nucleus reactions
• Testing the Lambda(1520) hyperon in-medium width in near-threshold proton-nucleus reactions
• Comparison of inclusive K+ production in proton-proton and proton-neutron collisions
• Studying Strange Meson Production with FOPI