Virtual corrections to the decay b->s+gamma

被引：129

作者：

Greub, C

Hurth, T

Wyler, D

机构：

[1] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309

[2] UNIV ZURICH,INST THEORET PHYS,CH-8057 ZURICH,SWITZERLAND

来源：

PHYSICS LETTERS B | 1996年 / 380卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(96)00496-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the O(alpha(s)) virtual corrections to the matrix element for b --> s gamma, taking into account the contributions of the four-Fermi operator O-2 and the electromagnetic and color dipole-type operators. The results are combined with existing O(alpha(s)) Bremsstrahlung corrections in order to obtain the relevant inclusive rate. The new result drastically reduces the large scale dependence of the leading logarithmic approximation. It implies that a very accurate prediction for the branching ratio for B --> X(s) gamma will become possible once also the corrections to the Wilson coefficients are available.

引用

页码：385 / 392

页数：8

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