More precise determination of Vcb & Vub and direct CP violation in charmless B decays

被引：0

作者：

Wang, WY ^{[1
]}

Wu, YL

Zhou, YF

机构：

[1] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China

[2] Univ Munich, Sekt Phys, D-80333 Munich, Germany

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2004年 / 45卷

关键词：

Kobayashi-Maskawa matrix; bottom mesons;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

More precise extractions on the two important CKM matrix elements \V-cb\ and \V-ub\ are presented up to 1/m(Q)(2) corrections, based on the complete heavy-quark effective field theory (HQEFT) of QCD. The HQEFT as a large component QCD provides us with a complete theoretical framework for correctly and systematically evaluating the subleading and higher-order contributions in 1/m(Q) expansion of heavy quarks. A global analysis on charmless B decays is made, based on the isospin and SU(3) flavor symmetry. An isospin relation is found to be very useful for studying SU(3) symmetry-breaking effects of strong phases and exploring new types of electroweak penguin effects. The direct CP violation in charmless B decays is predicted, and its precise measurement is helpful either for testing SU(3) symmetry breaking effects of strong phases or for probing news physics beyond standard model.

引用

页码：S459 / S466

页数：8

共 58 条

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