颗粒相干发射源的2π和3π玻色-爱因斯坦关联  

Two- and Three-Pion Bose-Einstein Correlations for Granular Source of Coherent Droplets

作　　者：杨志韬[1] 吉日木图[1] 霍雷[1] 张景波[1] 张卫宁[1] 

机构地区：[1]哈尔滨工业大学物理系,哈尔滨150001

出　　处：《高能物理与核物理》2007年第3期274-277,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10275015;10575024)资助~~

摘　　要：在假设由同一颗粒发射的兀介子为相干发射的条件下,给出了颗粒发射源模型的2π及3π关联函数,发射源的混沌性随颗粒数目的增加而增大．此外,对颗粒相干发射源及部分相干高斯源的归一化纯3π关联进行比较,发现当2π关联的混沌性参量小于0．8时,两种发射源的归一化纯3π关联值在小Q3区域有明显差别．We examine the two-pion and three-pion correlation functions for a granular source model of coherent droplets under the assumption that the pions emitted from the same droplet are coherent. The chaoticity of the source increases with the number of droplets in the granular source. By comparing the normalized pure three-pion correlations of the granular source and a partially coherent Gaussian source, we find that the difference of the nomalized pure threepion correlations between the two sources is distinct in small Q3 regine, when the chaoticity parameter of two-pion correlation is smaller than 0.8.

关 键 词：颗粒相干发射源 2π关联 归一化纯3π关联 

分 类 号：O572.21[理学—粒子物理与原子核物理]