重夸克展开下B→ηlν的光锥求和规则计算

Abstract

本文利用光锥求和规则讨论半轻衰变形状因子，并估算了分支比。计算在重夸克有效场论框架下进行，且在关联函数中分别采用手征流和赝标流，并且对不同方法的计算结果及实验数据作了比较。 The semileptonic decay is studied. The transition form factor and the branching ratio for this decay are calculated by using the light cone sum rule method within the framework of the heavy quark effective field theory. We adopt both the chiral current and the pseudoscalar current in the correlation functions. The results are compared with those from other approaches and ex-periments.