Three-loop matching of the dipole operators for b → sγ and b → sg

被引:110
作者
Misiak, M
Steinhauser, M
机构
[1] Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland
[2] Univ Hamburg, Inst Theoret Phys, D-22761 Hamburg, Germany
[3] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland
关键词
D O I
10.1016/j.nuclphysb.2004.02.006
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 evaluate the three-loop matching conditions for the dimension-five operators that are relevant for the b --> sgamma decay. Our calculation completes the first out of three steps (matching, mixing and matrix elements) that are necessary for finding the next-to-next-to-leading QCD corrections to this process. All such corrections must be calculated in view of the ongoing accurate measurements of the (B) over bar --> X(s)gamma branching ratio. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:277 / 305
页数:29
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