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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。
In this paper, we study the decay process of D → Kl ■ 珓 using the light cone QCD summing rule, and calculate the D → K transition shape factor. By constructing a new correlation function, the uncertainty of the twist-3 wave function can be eliminated. To make the calculation more accurate.The calculated branch ratio is consistent with the recent experimental data.