This article has an erratum: [https://doi.org/10.1140/epja/i2005-10004-8]

Eur. Phys. J. A 23, 379-385 (2005)
DOI: 10.1140/epja/i2004-10108-7

Transport analysis of K⁺ production in proton-nucleus reactions

Z. Rudy¹, W. Cassing², L. Jarczyk¹, B. Kamys¹, A. Kowalczyk^{1, 2} and P. Kulessa<sup>3

1</sup>  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

Wolfgang.Cassing@theo.physik.uni-giessen.de

(Received 28 October 2004 / Published online 12 January 2005)

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.

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