Exclusive decays of χbJ and ηb into two charmed mesons

被引：1

作者：

Azevedo, Regina S. ^{[1
]}

Long, Bingwei ^{[1
,2
]}

Mereghetti, Emanuele ^{[1
]}

机构：

[1] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[2] European Ctr Theoret Studies Nucl Phys & Related, I-38100 Villazzano, TN, Italy

来源：

PHYSICAL REVIEW D | 2009年 / 80卷 / 07期

关键词：

EFFECTIVE-FIELD-THEORY; NRQCD;

D O I：

10.1103/PhysRevD.80.074026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop a framework to study the exclusive two-body decays of bottomonium into two charmed mesons and apply it to study the decays of the C-even bottomonia. Using a sequence of effective field theories, we take advantage of the separation between the scales contributing to the decay processes, 2m(b) >> m(c) >> Lambda(QCD). We prove that, at leading order in the EFT power counting, the decay rate factorizes into the convolution of two perturbative matching coefficients and three nonperturbative matrix elements, one for each hadron. We calculate the relations between the decay rate and nonperturbative bottomonium and D-meson matrix elements at leading order, with next-to-leading log resummation. The phenomenological implications of these relations are discussed.

引用

页数：23

共 59 条

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