Strangeness production close to threshold
Strangeness production close to threshold
复制标题
怪异产量接近阈值
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Merschmeyer
中科院分区：
文献类型：
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作者：
M. Merschmeyer
在SIS/GSI上用FOPI探测器测量了能量为1.93AGeV的Ni+Ni碰撞中中性奇异粒子K 0 S和Λ（Λ0 + Λ 0）的产额和定向流。对于K 0，反斜率参数和粒子产额的分布与以前的K+测量结果显示出良好的一致性。此外，K 0和K+的定向流动模式被发现是兼容的。Λ和质子的比较显示出产率分布的显著差异，而两种粒子物种显示出相同的流动行为。
The production yields and the directed flow of the neutral strange particles K0S and Λ(Λ0 + Σ0) have been measured with the FOPI detector at SIS/GSI in Ni+Ni collisions of 1.93 A GeV energy. For the K0, the distributions of the inverse slope parameter and the particle yield show good agreement with the results of previous K+ measurements. Furthermore, the directed flow patterns of K0 and K+ are found to be compatible. The comparison of Λ and proton exhibits a significant difference in the yield distribution whereas both particle species show the same flow behaviour.