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.
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收藏
页码：209 / 213
页数：5
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