Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1997-06-18
Nucl.Phys. A628 (1998) 151-160
Physics
Nuclear Physics
Nuclear Theory
14 pages Latex, 4 PS-files
Scientific paper
10.1016/S0375-9474(97)00625-8
Coulomb final-state interaction of positive charged kaons in heavy ion reactions and its impact on the kaon transverse flow and the kaon azimuthal distribution are investigated within the framework of QMD (Quantum Molecular Dynamics) model. The Coulomb interaction is found to tend to draw the flow of kaons away from that of nucleons and lead to a more isotropic azimuthal distribution of kaons in the target rapidity region. The recent FOPI data have been analyzed by taking into accout both the Coulomb interaction and a kaon in-medium potential of the strong interaction. It is found that both the calculated kaon flows with only the Coulomb interaction and with both the Coulomb interaction and the strong potential agree within the error bars with the data. The kaon azimuthal distribution exhibits asymmetries of similar magnitude in both theoretical approaches. This means, the inclusion of the Coulomb potential makes it more difficult to extract information of the kaon mean field potential in nuclear matter from the kaon flow and azimuthal distribution data.
Faessler Amand
Fuchs Ch.
Kosov Daniel S.
Uma Maheswari V. S.
Wang Zhao-Sheng
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