Two-loop QCD corrections to b->c transitions at zero recoil: Analytical results

被引：61

作者：

Czarnecki, A

Melnikov, K

机构：

[1] Inst. F. Theoretische Teilchenphysik, Universität Karlsruhe

来源：

NUCLEAR PHYSICS B | 1997年 / 505卷 / 1-2期

关键词：

higher-order QCD corrections; Cabibbo-Kobayashi-Maskawa matrix; heavy quark decays;

D O I：

10.1016/S0550-3213(97)00500-2

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 present analytical results for the O(alpha(s)(2)) contributions to the functions eta A and eta V which parameterize QCD corrections to semileptonic b --> c transitions at zero recoil. Previously obtained approximate results are confirmed. The methods of computing the relevant two-loop diagrams with two mass scales are discussed in some detail. (C) 1997 Elsevier Science B.V.

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页码：65 / 83

页数：19

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