Quasifree p(K-,K+)Ξ- reaction in nuclear emulsion
Quasifree p(K-,K+)Ξ- reaction in nuclear emulsion
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DOI：
10.1016/s0375-9474(98)00596-x
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发表时间：
1998-12-28
影响因子：
1.4
通讯作者：
Yoon, CS
中科院分区：
文献类型：
--
作者：
Aoki, S;Asai, S;Yoon, CS
研究了1.66 GeV/c的K束诱导的（K-,K+）反应，鉴定出796个（K-,K+）反应顶点（p（K+）大于或等于1 GeV/c），包含18个单超片段。在鉴定的796个（K-,K+）反应中没有明显的（空间分离的）双超片段或双单超片段。对这些事件进行了分类，并详细描述了它们的特点。在p（K+）大于或等于1 GeV/c的区域，以准自由K-(p)—> K(+)Xi（-）为主导过程，确定从反应顶点发射Xi（-）的概率为73.9(-4.6)(+4.5)%。根据这个值，假设一个简单的均匀核物质模型，估计原子核中Xi（-）的平均自由程为4.7(-1.0)(+1.5)fm, [p(Xi-)]近似于0.6 GeV/c。(C) 1998爱思唯尔科学有限公司
A study of 1.66 GeV/c K- beam induced (K-,K+) reactions in the nuclear emulsion target is presented and 796 (K-, K+) reaction vertices (p(K+) greater than or equal to 1 GeV/c) containing 18 single hyperfragments are identified. There is no clear(spatially separated) double hyperfragment nor twin single hyperfragment in the identified 796 (K-,K+) reactions. These events are classified and their characteristics are described in detail. In the region p(K+)greater than or equal to 1 GeV/c where the quasifree K-(p) --> K(+)Xi(-) is the dominant process, the probability of Xi(-) emission from the reaction vertex is determined to be 73.9(-4.6)(+4.5)%. From this value, the mean free path of Xi(-) in a nucleus is estimated to be 4.7(-1.0)(+1.5) fm for [p(Xi-)] similar to 0.6 GeV/c by assuming a simple model of uniform nuclear matter. (C) 1998 Elsevier Science B.V.