Matching QCD and HQET heavy-light currents at three loops

被引：23
|
作者：
Bekavac, S. [2 ]
Grozin, A. G. [2 ,3 ]
Marquard, P. [2 ]
Piclum, J. H. [1 ]
Seidel, D. [1 ]
Steinhauser, M. [2 ]
机构：
[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada
[2] KIT, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany
[3] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
来源：
NUCLEAR PHYSICS B | 2010年 / 833卷 / 1-2期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Heavy Quark Effective Theory; Radiative corrections; EFFECTIVE FIELD-THEORY; ANOMALOUS DIMENSION; QUARK MASS; FEYNMAN-INTEGRALS; BETA-FUNCTION; (MS)OVER-BAR; DECAY; POLE;
D O I：
10.1016/j.nuclphysb.2010.02.025
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 consider the currents formed by a heavy and a light quark within Quantum Chromodynamics and compute the matching to Heavy Quark Effective Theory to three-loop accuracy. As an application we obtain the third-order perturbative corrections to ratios of B-meson decay constants. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：46 / 63
页数：18
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