B*d→Bdγ辐射衰变研究

B^*_d→B_dγ辐射衰变研究

吴向尧¹，尹新国¹，吴忠和¹，尹建华²，谢宇¹，郭义庆³

1. 淮北煤炭师范学院物理系，淮北 235000; 2. 吉林大学物理学院，长春 130023; 3. 中国科学院高能物理研究所，北京 100039

收稿日期:2003-06-03 修回日期:1900-01-01 出版日期:2004-04-26 发布日期:2004-04-26
通讯作者: 吴向尧

Radiative decay B^*_d→B_dγ

WU Xiang-yao¹, YIN Xin-guo¹, WU Zhong-he¹， YIN Jian-hua², XIE Yu¹, GUO Yi-qing³

1. Department of Physics, Huaibei Coal Industry Teachers College, Huaibei 235000, China;2. College of Physics, Jilin University, Changchun 130023, China；3. Institute of High Energy Physics, Academy of Science China, Beijing 100039, China

Received:2003-06-03 Revised:1900-01-01 Online:2004-04-26 Published:2004-04-26
Contact: WU Xiang-yao

摘要/Abstract

摘要： 用一种改进的光锥QCD求和规则研究辐射衰变B^*_{d→B_{dγ. 在关联函数中选择适当的手征流算符，计算耦合常gB^* _dB_dγ，从而消除了矩阵元〈γ(q)|d(x)γ_μγ₅d(0)|0〉的不确定性对计算结果的影响，其衰变宽度与标准的光锥QCD求和规则计算结果在误差范围内一致.}}

关键词: 改进的光锥QCD求和规则, 辐射衰变, 衰变宽度

Abstract: The radiate decay B^*_d→B_dγ was studi ed with the improved light-cone QCD summation rules method in which adequate chiral current operators are chosen in the correlation function used for calculation of the coupling constantgB^*_dB_dγ, eliminating completely the effect from the uncertainty of the matrix element 〈γ(q)|(x)γ_μγ₅d(0)| 0〉. The decay width is agreement with the result of standard light-cone QCD sum rules in the range of error margin.

Key words: improved light-cone QCD sum rules, radiate decay, deca y width

中图分类号:

O572.33

吴向尧，尹新国，吴忠和，尹建华，谢宇，郭义庆. B^*_d→B_dγ辐射衰变研究[J]. J4, 2004, 42(02): 242-245.

WU Xiang-yao, YIN Xin-guo, WU Zhong-he， YIN Jian-hua, XIE Yu, GUO Yi-qing. Radiative decay B^*_d→B_dγ[J]. J4, 2004, 42(02): 242-245.