K{sup 0} and {lambda} production in Ni+Ni collisions near threshold
K{sup 0} and {lambda} production in Ni+Ni collisions near threshold
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DOI：
10.1103/physrevc.76.024906
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发表时间：
2007-03
影响因子：
3.1
通讯作者：
M. Merschmeyer;X. Lopez;N. Bastid;P. Crochet;N. Herrmann;E. al.;Fopi collaboration
中科院分区：
文献类型：
--
作者：
M. Merschmeyer;X. Lopez;N. Bastid;P. Crochet;N. Herrmann;E. al.;Fopi collaboration
本文介绍了用德国达姆施塔特的FOPI探测器测量的1.93AGeV的Ni+Ni碰撞中中性奇异粒子K{sup 0}和{lambda}产生的新结果。快度密度分布和玻尔兹曼斜率参数分布测量在几乎整个相空间的反应。观测值与现有的K{sup +}和质子数据进行了比较。虽然K{sup 0}数据与先前报道的K{sup +}测量结果一致，但{lambda}分布显示出与质子不同的行为。首次在GSI Schwerionen同步加速器（SIS）能量下讨论了奇异平衡和每个参与核子的产额随反应中心性的变化。
New results concerning the production of neutral strange particles, K{sup 0} and {lambda} in Ni+Ni collisions at 1.93A GeV, measured with the FOPI detector at GSI Darmstadt, are presented. Rapidity density distributions and Boltzmann slope parameter distributions are measured in nearly the full phase space of the reaction. The observables are compared to existing K{sup +} and proton data. While the K{sup 0} data agree with previously reported K{sup +} measurements, the {lambda} distributions show a different behavior relative to that of protons. The strangeness balance and the production yield per participating nucleon as a function of the centrality of the reaction are discussed, for the first time at GSI Schwerionen Synchrotron (SIS) energies.