The nuclear equation of state probed by $K^+$ production in heavy ion collisions

Details The nuclear equation of state probed by $K^+$ production in heavy ion collisions The nuclear equation of state probed by $K^+$ production in heavy ion collisions

2001-03-15

arxiv.org/abs/nucl-th/0103036v1

J.Phys.G28:1615-1622,2002

Physics

Nuclear Physics

Nuclear Theory

14 pages Revtex, 6 figures, Proceedings to the XXXIX Interantional Winter Meeting on Nuclear Physics, Bormio, Italy, 2001

Scientific paper

10.1088/0954-3899/28/7/313

The dependence of $K^+$ production on the nuclear equation of state is investigated in heavy ion collisions. An increase of the excitation function of $K^+$ multiplicities obtained in heavy ($Au+Au$) over light ($C+C$) systems when going far below threshold which has been observed by the KaoS Collaboration strongly favours a soft equation of state. This observation holds despite of the influence of an in-medium kaon potential predicted by effective chiral models which is necessary to reproduce the experimental $K^+$ yields. Phase space effects are discussed with respect to the $K^+$ excitation function.

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