~0→"非汉字符号"~0π~0衰变过程的分支比计算  

Calculation on Branch Ratio of ■~0→■~0π~0 Decay

作　　者：朱晓梅[1] 袁五届[2] 尹新国[2] 

机构地区：[1]淮北职业技术学院物理系 [2]淮北煤炭师范学院物理系,安徽淮北235000

出　　处：《安徽理工大学学报（自然科学版）》2004年第3期81-84,共4页Journal of Anhui University of Science and Technology:Natural Science

摘　　要：由于衰变过程中存在的非微扰问题,B介子的非轻子衰变的理论预言面临很大的挑战。在光锥QCD求和规则框架内,详细讨论在B0→K0π0衰变中软胶子交换对衰变振幅的贡献,系统地研究B0→K0π0衰变过程的强子矩阵元并计算了分支比,计算结果与实验结果相一致。The theoretical prediction about non-lepton decay of B-meson is facing challenges .Because there is not tiny perturbation in the course of decay. In the framework of quantum chromo dynamics(QCD) sum rule, this paper discusses in details that exchange of soft gluon contributes to decay amplitude in B^0→K^0π~0 decay and the hadronic matrix element and branch ratio about B^0→K^0π~0 decay were studied systematically. The calculation is consistent with the experiment result.

关 键 词：B介子衰变 强子矩阵元 分支比 

分 类 号：O572.331[理学—粒子物理与原子核物理]