Probing the nuclear equation of state by $K^+$ production in heavy ion collisions

Details Probing the nuclear equation of state by $K^+$ production in heavy ion collisions Probing the nuclear equation of state by $K^+$ production in heavy ion collisions

2000-11-30

arxiv.org/abs/nucl-th/0011102v2

Phys.Rev.Lett. 86 (2001) 1974-1977

Physics

Nuclear Physics

Nuclear Theory

4 pages Revtex, 4 PS figures, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.86.1974

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.

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