Evidence for a Soft Nuclear Equation-of-State from Kaon Production in Heavy-Ion Collisions.
Evidence for a Soft Nuclear Equation-of-State from Kaon Production in Heavy-Ion Collisions.
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DOI：
10.1103/physrevlett.86.39
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发表时间：
2000-11
影响因子：
8.6
通讯作者：
C. Sturm;I. Böttcher;M. Dȩbowski;A. Förster;E. Grosse;P. Koczoń;B. Kohlmeyer;F. Laue;M. Mang;L. Naumann;H. Oeschler;F. Pühlhofer;E. Schwab;P. Senger;Y. Shin;J. Speer;H. Ströbele;G. Surówka;F. Uhlig;A. Wagner;W. Waluś
中科院分区：
文献类型：
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作者：
C. Sturm;I. Böttcher;M. Dȩbowski;A. Förster;E. Grosse;P. Koczoń;B. Kohlmeyer;F. Laue;M. Mang;L. Naumann;H. Oeschler;F. Pühlhofer;E. Schwab;P. Senger;Y. Shin;J. Speer;H. Ströbele;G. Surówka;F. Uhlig;A. Wagner;W. Waluś
在德国重离子研究中心（GSI）的同步加速器SIS上，利用介子谱仪，在束流能量为0.6 - 1.5A GeV的\(^{197}Au + ^{197}Au\)碰撞中测量了π介子和K介子的产生。在\(Au + Au\)碰撞中，每个核子的\(K^{+}\)介子多重数相对于\(C + C\)反应增强了多达6倍，而相应的π介子比率则降低了。\(Au + Au\)和\(C + C\)碰撞的\(K^{+}\)介子激发函数之比随着束流能量的降低而增加。这种行为是软核态方程所预期的。
The production of pions and kaons has been measured in 197Au+197Au collisions at beam energies from 0.6 to 1.5A GeV with the kaon spectrometer at SIS/GSI. The K+ meson multiplicity per nucleon is enhanced in Au+Au collisions by factors up to 6 relative to C+C reactions, whereas the corresponding pion ratio is reduced. The ratio of the K+ meson excitation functions for Au+Au and C+C collisions increases with decreasing beam energy. This behavior is expected for a soft nuclear equation-of-state.