Weak radiative B-meson decay beyond leading logarithms

被引：477

作者：

Chetyrkin, K

Misiak, M

Munz, M

机构：

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

[2] TECH UNIV MUNICH, DEPT PHYS, D-85748 GARCHING, GERMANY

[3] RUSSIAN ACAD SCI, INST NUCL RES, MOSCOW 117312, RUSSIA

[4] UNIV WARSAW, INST THEORET PHYS, PL-00681 WARSAW, POLAND

来源：

PHYSICS LETTERS B | 1997年 / 400卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(97)00324-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present our results for three-loop anomalous dimensions necessary in analyzing B-->X-s gamma decay at the next-to-leading order in QCD. We combine them with other recently calculated contributions, obtaining a practically complete next-to-leading order prediction for the branching ratio B(B-->X-s gamma) = (3.28 +/- 0.33) x 10(-4). The uncertainty is more than twice smaller than in the previously available leading order theoretical result. The Standard Model prediction remains in agreement with the CLEO measurement at the 2 sigma level. (C) 1997 Elsevier Science B.V.

引用

页码：206 / 219

页数：14

共 37 条

[1] O(ALPHA(S)) CALCULATION OF THE DECAYS B-]S+GAMMA AND B-]S+G [J].