The nuclear equation of state observed in earthbound experiments

被引：4

作者：

Hartnack, Ch.

Aichelin, Joerg

机构：

[1] Univ Nantes, Ecole Mines, IN2P3 CNRS, SUBATECH Lab Phys Subatom Technol Assoc, F-44072 Nantes, France

[2] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2007年 / 16卷 / 2-3期

关键词：

equation of state;

D O I：

10.1142/S0218271807009905

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The stiffness of the hadronic equation of state has been extracted from the production rate of K+ mesons in heavy ion collisions around 1 A GeV incident energy. The data are best described with a compression modulus K around 200 MeV, a value which is usually called "soft." This is concluded from a detailed comparison of the results of transport theories with the experimental data using two different procedures: (i) the energy dependence of the ratio of K+ from Au+ Au and C+C collisions and (ii) the centrality dependence of the K+ multiplicities. It is demonstrated that input quantities of these transport theories which are not precisely known, like the kaon-nucleon potential, the Delta N -> NK+Lambda cross-section or the lifetime of the Delta in matter do not modify this conclusion.

引用

页码：153 / 164

页数：12

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