Dresden 2000 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 5: Physik mit schweren Ionen I / Experiment und Theorie

HK 5.4: Group Report

Monday, March 20, 2000, 15:30–16:00, B 114

Kaon Production in heavy ion collsisions and the nuclear euqation of state — •C. Fuchs, Amand Faessler, E. Zabrodin, and L. Bravina — Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen

We investigate the question if valuable information on the nuclear EOS can be extracted form the subthreshold kaon production in heavy ion collisions. The KaoS Collaboration has performed systematic measurements of the K⁺ production far below threshold in heavy (Au+Au) and light (C+C) systems [1,2]. Looking at the ratios buildt from heavy and light systems possible uncertainties which might still exist in the theoretical calculations should cancel out to large extent and thus allow to draw more reliable conclusions. In particular we investigate the energy dependence of the K⁺ excitation function for Au+Au and C+C with respect to the nuclear EOS and also with respect to the kaon in-medium potential originating from strong interactions. We further perform a systematic study of the K⁺ transverse and elliptic flow and compare also with recent flow data obtained by KaoS.

[1] F. Laue and the KaoS Collaboration, Phys. Rev. Lett. 82, 1640 (1998).

[2] P. Senger, Prog. Part. Nucl. Phys. 42 (1999) 209.