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

页码：46 / 63

页数：18

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