Factorization in leptonic radiative B→γeν decays

被引：110

作者：

Lunghi, E ^{[3
]}

Pirjol, D

Wyler, D

机构：

[1] DESY, D-22607 Hamburg, Germany

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

来源：

NUCLEAR PHYSICS B | 2003年 / 649卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0550-3213(02)01032-5

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We discuss factorization in exclusive radiative leptonic B --> gammaev decays using the soft-collinear effective theory. The form factors describing these decays can be expanded in a power series in Lambda(QCD)/Egamma with Egamma the photon energy. We write down the most general operators in the effective theory which contribute to the form factors at leading order in Lambda(QCD)/Egamma, proving their factorization into hard, jet and soft contributions, to all orders in a, (C) 2002 Published by Elsevier Science B.V.

引用

页码：349 / 364

页数：16

共 37 条

[1] ESTIMATES OF THE WEAK ANNIHILATION CONTRIBUTIONS TO THE DECAYS B-]RHO+GAMMA AND B-]OMEGA+GAMMA [J].