K~＋核散射与核介质效应

K+NUCLEUS SCATTERING AND NUCLEARMEDIUM EFFECTS

近年来中能Ｋ＋核散射的研究引起人们相当大的兴趣。本文评述Ｋ＋介子作为原子核深部的最“干净”的强子探针呈现出的主要特点；总结了实验数据和理论结果之间存在的系统而严重的偏离；着重讨论了Ｋ＋核散射中传统和非传统核介质效应；最后指出：（１）不能简单地由Ｋ＋核子散射来解释Ｋ＋核散射；（２）Ｋ＋介子可能用来探测核内核子性质的变化，成为轻子或电磁探针的有益补充；（３）文内指出的问题要求在实验上和理论上做更多的工作。

The study of K+ -nucleus scattering at intermediate energies has attracted considerableattention over the last few years. A review of K+ scattering as a 'clean'' hadronic probe ofthe nuclear interior is presented here- Systematic deviations between experimental and theoretical cross sections are summarized. We discuss, in particular ,various aspects of the tradi-tional and nontraditional nuclear medium effects. Our major conclusions are(1 )K+-nucleusscattering could not be understood simply in terms of K+nu...