Strong phases and factorization for color suppressed decays

被引：80

作者：

Mantry, S ^{[1
]}

Pirjol, D

Stewart, IW

机构：

[1] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

PHYSICAL REVIEW D | 2003年 / 68卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.68.114009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We prove a factorization theorem in QCD for the color suppressed decays (B) over bar (0)-->(DM0)-M-0 and (B) over bar (0)-->D*M-0(0) where M is a light meson. Both the color-suppressed and W-exchange or annihilation amplitudes contribute at lowest order in Lambda(QCD)/Q where Q={m(b),m(c),E-pi}, so no power suppression of annihilation contributions is found. A new mechanism is given for generating nonperturbative strong phases in the factorization framework. Model-independent predictions that follow from our results include the equality of the (B) over bar (0)-->(DM0)-M-0 and (B) over bar (0)-->D*M-0(0) rates and the equality of nonperturbative strong phases between isospin amplitudes, delta((DM))=delta((D)*(M)). Relations between amplitudes and phases for M=pi,rho are also derived. These results do not follow from large N-c factorization with heavy quark symmetry.

引用

页数：23

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