Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2002-02-15
J.Phys.G28:1591-1598,2002
Physics
Nuclear Physics
Nuclear Experiment
8 pages, 6 figures, talk presented at SQM2001 in Frankfurt, Sept.2001, submitted to Journal of Physics G
Scientific paper
10.1088/0954-3899/28/7/310
Heavy ion collisions at SIS energies (1-2 AGeV) offer an unique tool to probe the properties of hot and dense nuclear matter. In particular, the partial restoration of chiral symmetry is predicted to lead in this energy range to in-medium modifications of hadron properties. Strange particle production below or close to the threshold energy is a useful probe to investigate these in-medium effects. The FOPI collaboration has recently measured the production and the propagation of charged and neutral strange particles. The K+ production probability is investigated as a function of the system size at a beam energy of 1.5 AGeV. Results on K0 production in Ru+Ru collisions at 1.69 AGeV are presented, as well as K-/K+ ratio as a function of rapidity. In addition, the sideward flow of charged and neutral strange particles has been measured. Results are compared to predictions of transport calculations (BUU and IQMD).
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