EFFECT OF THE HAIRPIN DIAGRAM ON 2-BODY NONLEPTONIC B-DECAYS AND CP VIOLATION

被引：24

作者：

DU, DS ^{[1
]}

XING, ZZ ^{[1
]}

机构：

[1] INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA

来源：

PHYSICS LETTERS B | 1993年 / 312卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/0370-2693(93)90510-O

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A careful quark-diagram analysis shows that a number of two-body nonleptonic B decays can occur through the so-called hairpin diagram, a QCD loop-induced graph different from the penguin one in final-state hadronization of valence quarks. Using the two-loop renormalization-group-improved effective Hamiltonian and the naive factorization approximation, we demonstrate the effect of the hairpin diagram on decay rates and CP asymmetries for a few interesting channels such as B(d)0,B(d)0BAR --> psiK(s) and B(u)+/- --> phiK+/-. Branching ratios of some pure hairpin decay modes, e.g., B(u)- -->phipi-, phirho- and B(d)0BAR --> phipi0, phirho0, phiomega, phieta, etc., are estimated to be on the order of 10(-7).

引用

页码：199 / 204

页数：6

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