Three-loop anomalous dimension of the heavy quark pair production current in nonrelativistic QCD

被引：45
|
作者：
Hoang, AH [1 ]
机构：
[1] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany
来源：
PHYSICAL REVIEW D | 2004年 / 69卷 / 03期
关键词：
D O I：
10.1103/PhysRevD.69.034009
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The three-loop nonmixing contributions to the anomalous dimension of the leading order quark pair production current in nonrelativistic QCD are computed. It is demonstrated that the renormalization procedure can only be carried out consistently if the dynamics of both soft and ultrasoft degrees of freedom is present for all scales below the heavy quark mass and if the soft and ultrasoft renormalization scales are always correlated.
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页数：11
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