Transport analysis of K+ production in proton-nucleus reactionsZ. Rudy1, W. Cassing2, L. Jarczyk1, B. Kamys1, A. Kowalczyk1, 2 and P. Kulessa3
1 M. Smoluchowski Institute of Physics, Jagellonian University, PL-30059, Cracow, Poland
2 Institut für Theoretische Physik, Justus Liebig Universität Giessen, D-35392, Giessen, Germany
3 W. Niewodniczanski Institute of Nuclear Physics, PL-31342, Cracow, Poland
(Received 28 October 2004 / Published online 12 January 2005)
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.PACS
13.60.Le - Meson production.
13.75.Jz - Kaon-baryon interactions.
14.40.Aq - &Pi,K , and η mesons.
25.40.-h - Nucleon-induced reactions. Correspondence: Wolfgang.Cassing@theo.physik.uni-giessen.de
© Società Italiana di Fisica, Springer-Verlag 2005