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引用次数: 2
摘要
在这篇综述中，我们讨论了B介子的光锥分布振幅和光锥和规则框架内的B、P、V形因子的计算。详细介绍了B介子分布振幅的定义、尺度演化和现象学模型。我们给出了计算形状因子和规则的次领先阶QCD修正的两种等效方法，即软共线有效理论中的区域法和逐步匹配法。显示了对B、P、V形状因子的功率抑制修正，特别是高捻B介子分布幅度的贡献。我们还给出了形状因子的数值结果，包括QCD和功率校正，以及预测形状因子的现象学应用，如CKM矩阵元素V u b的确定。
B
⟶
P
,
V
Form Factors with the
B
-Meson Light-Cone Sum Rules
In this review, we discuss the calculation of the
B
⟶
P
,
V
form factors within the framework of the light-cone sum rules with the light-cone distribution amplitudes of the
B
-meson. A detailed introduction to the definition, scale evolution, and phenomenological models of the
B
-meson distribution amplitudes is presented. We show two equivalent approaches of calculating the next-to-leading order QCD corrections to the sum rules for the form factors, i.e., the method of regions and the step-by-step matching in the soft-collinear effective theory. The power suppressed corrections to the
B
⟶
P
,
V
form factors especially the contributions from the higher-twist
B
-meson distribution amplitudes are displayed. We also present numerical results of the form factors including both the QCD and the power corrections, and phenomenological applications of the predicted form factors such as the determination of the CKM matrix element
V
u
b
.
期刊介绍：
Advances in High Energy Physics publishes the results of theoretical and experimental research on the nature of, and interaction between, energy and matter. Considering both original research and focussed review articles, the journal welcomes submissions from small research groups and large consortia alike.
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