Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 10, Pages 1974-1977Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.1974
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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 favors a soft equation of state. This observation holds despite the influence of an in-medium kaon potential predicted by effective chiral models which is necessary to reproduce the experimental K+ yields.
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