D^+→π~0l■_l衰变过程研究

Research on D^+→π~0l■_1 Decay

用光锥QCD求和规则研究D+→π0lv^l衰变过程,在计算D+→π0跃迁形状因子过程中,通过构造新的关联函数,消除了tw ist-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.最后计算得到的分支比与最近的实验数据相一致.

In this paper, the D^＋→π^0lvl~ decay was researched by QCD sum rules. Firstly the form factor of D→π 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 form factor was more precisel, and the branching ratio was consistant with the experimental data.