SOFT GLUON SUPPRESSION OF 1/N-C CONTRIBUTIONS IN COLOR SUPPRESSED HEAVY MESON DECAYS

被引：24

作者：

HALPERIN, I

机构：

[1] Technion - Israel Institute of Technology, Department of Physics, Haifa

来源：

PHYSICS LETTERS B | 1995年 / 349卷 / 04期

关键词：

D O I：

10.1016/0370-2693(95)00264-L

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the non-factorizable terms in color suppressed (Class II) decays. Our emphasis is on the non-perturbative soft gluon exchange mechanism, which has been previously found to be responsible for the rule of discarding 1/N-c in the Class I decays. The non-factorizable contribution to the decay (B) over bar(0) --> D-0 pi(0) at the tree level is estimated within the light cone QCD sum rule method which combines the technique of the QCD sum rules with the description of the pion in terms of the set of wave functions of increasing twist. We find that the same soft gluon exchange mechanism tends to cancel the 1/N-c term in the factorized amplitude.

引用

页码：548 / 554

页数：7

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