BOUND-STATE EFFECTS IN B-]K-ASTERISK-GAMMA

被引：19
作者：
CARLSON, CE [1 ]
MILANA, J [1 ]
机构：
[1] UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742
来源：
PHYSICAL REVIEW D | 1995年 / 51卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.51.4950
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Applying perturbative QCD methods recently seen to give a good description of the two-body hadronic decays of the B meson, we address the question of bound-state effects on the decay B→K*γ. Consistent with most analyses, we demonstrate that gluonic penguin diagrams, with photonic bremsstrahlung off a quark, change the decay rate by only a few percent. Using an asymptotic distribution amplitude for the K* and just the standard model, we can obtain a branching ratio of a few ×10-5, consistent with the observed rate. © 1995 The American Physical Society.
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收藏
页码：4950 / 4954
页数：5
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