Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-11-02
Phys.Rev.C71:034910,2005
Physics
Nuclear Physics
Nuclear Theory
20 pages, 25 figures, added statistical errors in figures
Scientific paper
10.1103/PhysRevC.71.034910
The BUU transport model is applied to study strangeness and pion production in nucleus-nucleus collisions. Starting from proton induced reactions, we further investigate Si+Au, Au+Au and Pb+Pb collisions in the energy range between 2 and 40 A$\cdot$GeV and compare with data and with other transport calculations. The $q \bar q$ annihilation, or resonance, channel simulated by the string model in meson-nucleon collisions at $\sqrt{s} > 2$ GeV is introduced. The importance of this channel for a good description of the proton-nucleus data on $K^+$ production is demonstrated. We, furthermore, show that the meson-meson collisions contribute significantly to the $K \bar K$ production in heavy-ion collisions above 5 A GeV and improve an agreement with data on the $K^+/\pi^+$ ratio. Finally, we study the influence of the in-medium modifications of the FRITIOF model on the pion and kaon production.
Larionov A. B.
Mosel Ulrich
Wagner Markus
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