| D+→K0l+νl衰变过程分支比的计算 |
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| 引用本文： | 王光怀,刘晓静,公丕锋,赵书华,郭义庆 . D+→K0l+νl衰变过程分支比的计算[J]. 吉林大学学报(理学版), 2006, 44(5): 779-783 |
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| 作者姓名： | 王光怀 刘晓静 公丕锋 赵书华 郭义庆 |
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| 作者单位： | 1. 吉林师范大学 物理学院, 吉林省 四平 136000; 2. 安徽淮北煤炭师范学院 物理系, 安徽省 淮北 235000; 3. 中国科学院 高能物理研究所, 北京 100039 |
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| 摘 要： | 通过QCD求和规则研究D+→K0l+νl衰变过程, 计算D→K跃迁形状因子, 通过构造新的关联函数, 消除了twist-3波函数的不确定性对计算结果的影响, 使计算结果更精确. 计算得到的分支比与实验数据一致.
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| 关 键 词： | QCD求和规则 D介子半轻衰变 分支比 形状因子 |
| 收稿时间： | 2005-11-07 |
Calculation of the Branching Ratio for D+→K0l+νl Decay |
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| WANG Guang huai,LIU Xiao jing,GONG Pi feng,ZHAO Shu hua,GUO Yi qing. Calculation of the Branching Ratio for D+→K0l+νl Decay[J]. Journal of Jilin University: Sci Ed, 2006, 44(5): 779-783 |
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| Authors: | WANG Guang huai LIU Xiao jing GONG Pi feng ZHAO Shu hua GUO Yi qing |
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| Affiliation: | 1. College of Physics, Jilin Normal University, Siping 136000, Jilin Province, China; 2. Department of Physics, Huaibei Coal Industry Teacher’s College, Huaibei 235000, Anhui Province, China; 3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | The D+→K0l+νl decay was researched by means of QCD sum rules. Firstly, the form factor of D→K was calculated by chosing a new correlative function to eliminate the effect caused by the uncertainty of twist-3 function, so the calculation result of the form factor is more precisely, and the branch ratio is consistent with the experimental data. |
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| Keywords: | QCD sum rule D semileptonic decay branching ratio form factor |
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