RADIATIVE-CORRECTIONS AND SEMILEPTONIC B-DECAYS

被引:87
作者
ATWOOD, D
MARCIANO, WJ
机构
[1] Physics Department, Brookhaven National Laboratory, Upton
来源
PHYSICAL REVIEW D | 1990年 / 41卷 / 05期
关键词
D O I
10.1103/PhysRevD.41.1736
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A prescription for approximating electroweak radiative corrections to weak decays is given. The method is illustrated for 'e» and a simplified (structureless) model of B'Me», M=D or , where the complete O() corrections are known. Our procedure is shown to provide a proper description of radiation damping near the electrons end-point energy and a reasonable estimate of radiative corrections for much of the spectrum as well as the integrated rate. As a practical application, it is applied to the semileptonic decays B'Xe» where an exact O() treatment of radiative corrections is very difficult, but an estimate of their effect is important for the extraction of Vub and leptonic branching ratios. We also discuss an 18% enhancement of (4S)'B+B- relative to B0B» 0 due to large Coulomb corrections near threshold. © 1990 The American Physical Society.
引用
收藏
页码:1736 / 1740
页数:5
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