D→Kl■珓衰变过程的研究

Research on D→Kl■ Decay

文章用光锥QCD求和规则研究D→Kl■珓衰变过程,计算了D→K跃迁形状因子,通过构造新的关联函数,消除了由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。

The D→Klu^~l decay is researched by means of the light - cone QCD sum rules and the form factor is calculated by choosing a new correlative function to eliminate the effect caused by the uncertainty of twist - 3 function. As a result, the calculation of form factor is more precise and the branch ratio is consistent with the experimental data.