Two-loop matching coefficients for heavy quark currents

被引：30
|
作者：
Kniehl, B. A.
Onishchenko, A.
Piclum, J. H.
Steinhauser, M.
机构：
[1] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany
[2] Petersburg Nucl Phys Inst, Dept Phys Theor, Gatchina 188300, Russia
[3] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany
[4] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany
来源：
PHYSICS LETTERS B | 2006年 / 638卷 / 2-3期
关键词：
QCD CORRECTIONS; FORM-FACTORS; FEYNMAN-INTEGRALS; ANNIHILATION;
D O I：
10.1016/j.physletb.2006.05.023
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this Letter we consider the matching coefficients up to two loops between Quantum Chromodynamics (QCD) and Non-Relativistic QCD (NRQCD) for the vector, axial-vector, scalar and pseudo-scalar currents. The structure of the effective theory is discussed and analytical results are presented. Particular emphasis is put on the singlet diagrams. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：209 / 213
页数：5
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