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关于D0→π-1+ν1衰变过程的研究
Study of D0→π-1+ν1 Decay
【摘要】 用光锥QCD求和规则研究D0→π-1+ν1衰变过程,首先计算D→π跃迁形状因子,通过构造新的关联函数,消除了twist-3波函数的不确定性给计算结果所带来的影响,从而使计算结果更加精确.计算得到的分支比与最近的实验数据相一致.
【Abstract】 In this paper, the D0→π-1+ν1 decay process is studied by applying light-cone QCD sum rules. The form factor of D→πtransition is calculated by choosing a correlation function with a chiral current to eliminate the effect caused by the uncertainty of the twist-3 function of the pion . Therefore the calculated result of the form factor is improved, and the branching ratio of the D0→π-1+ν1 decay process is consistent with the new experimental data.
【关键词】 光锥QCD求和规则;
分支比;
形状因子;
CKM矩阵元;
【Key words】 light cone QCD sum rules; branching ratio; form factor; CKM matrix element;
【Key words】 light cone QCD sum rules; branching ratio; form factor; CKM matrix element;
【基金】 安徽省教育厅自然科学基金(2004KJ323)资助~~
- 【文献出处】 高能物理与核物理 ,High Energy Physics and Nuclear Physics , 编辑部邮箱 ,2006年11期
- 【分类号】O572.3
- 【下载频次】37