高能碰撞中电荷起伏的测量  

Measures of Charge Fluctuation in High Energy Collisions

作　　者：冯傲奇[1] 吴元芳[1] 

机构地区：[1]华中师范大学粒子物理研究所,武汉430079

出　　处：《高能物理与核物理》2005年第8期766-769,共4页High Energy Physics and Nuclear Physics

摘　　要：利用强子-强子碰撞的模型PYTHIA以及核-核碰撞的模型RQMD比较了各种电荷起伏测量量的快度依赖性,结果发现,这些测量量对快度的依赖性依赖于模型.但是,电荷关联能很好地测量整体电荷守恒以及短程快度关联性质.因此,被认为是一个好的反应电荷起伏的测量量.The dependencies of all suggested measures for charge fluctuation on the size of rapidity window are compared by using the hadronic and nuclear collision models--PYTHIA and RQMD. It is found that such dependency is model dependent. However, the charge correlations have the best measure for the effects of global charge conservation and short-range rapidity correlation and is therefore recommended.

关 键 词：高能碰撞 电荷起伏 强子-强子碰撞 测量量 电荷守恒 

分 类 号：O572.2[理学—粒子物理与原子核物理]