Fat penguins and imaginary penguins in perturbative QCD

被引：570

作者：

Keum, YY ^{[1
]}

Li, HN

Sanda, AI

机构：

[1] Acad Sinica, Inst Phys, Taipei 115, Taiwan

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[3] Nagoya Univ, Dept Phys, Nagoya, Aichi 46401, Japan

来源：

PHYSICS LETTERS B | 2001年 / 504卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(01)00247-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We evaluate B --> K pi decay amplitudes in perturbative QCD picture. It is found that penguin contributions are dynamically enhanced by nearly 50% compared to those assumed in the factorization approximation. It is also shown that annihilation diagrams are not negligible, and give large strong phases. Our results for branching ratios of B --> K pi decays for a representative parameter set an consistent with data. (C) 2001 Published by Elsevier Science B.V.

引用

页码：6 / 14

页数：9

共 23 条

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[Anonymous], 1999, CP VIOLATION

[2]

Ball P, 1998, J HIGH ENERGY PHYS

[3] QCD factorization for B → ππ decays:: Strong phases and CP violation in the heavy quark [J].