光锥QCD求和规则计算B_S→K形状因子

The Calculation of B_S→K Form Factor in the Light Cone QCD Sum Rule

本文用光锥QCD求和规则计算BS→K跃迁形状因子,通过构造新的关联函数,消除了twist-3波函数的不确定性给计算结果所带来的影响,从而能更精确地抽取CKM矩阵元｜Vub｜.

In this paper,the BS→K transition form factor was calculated by the light cone QCD sum rule.We chosed a new correlative function to eliminate the effect caused by the uncertainty of twist-3 function,so that CKM matrix element |Vub| can be extracted precisely.