Next-to-leading-order matching for the magnetic photon-penguin operator in the B→Xsy decay

被引：64

作者：

Buras, AJ ^{[1
]}

Kwiatkowski, A ^{[1
]}

Pott, N ^{[1
]}

机构：

[1] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

来源：

NUCLEAR PHYSICS B | 1998年 / 517卷 / 1-3期

关键词：

D O I：

10.1016/S0550-3213(98)00109-6

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：

The initial condition at the matching scale mu(w) = O(M-w) for the Wilson coefficient of the magnetic photon-penguin operator in the decay B --> X-s gamma is calculated in the next-to-leading-order approximation. The technical details of the necessary two-loop calculation in the full theory are described and the matching with the corresponding result in the effective theory is discussed in detail. Our outcome for the initial condition confirms the final results of Adel and Yao and Greub and Hurth. We show that the matching procedure can be properly performed for infrared divergent amplitudes, i.e. independently of contributions from gluon bremsstrahlung. (C) 1998 Published by Elsevier Science B.V.

引用

页码：353 / 373

页数：21

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