Power corrections in QCD: A matter of energy resolution

被引:16
作者
Akhoury, R
Zakharov, VI
机构
[1] Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI
关键词
D O I
10.1103/PhysRevLett.76.2238
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider powerlike corrections in QCD which can be viewed as power suppressed infrared singularities. We argue that the presence of these singularities depends crucially on the energy resolution. In the case of poor energy resolution, i.e., inclusive cross sections, there are constraints on infrared singularities expressed by the Kinoshita-Lee-Nauenberg (KLN) theorem. We rewrite the theorem in covariant notations and argue that the KLN theorem implies the extension of the Bloch-Nordsieck cancellation of logarithmic singularities to the case of linear corrections.
引用
收藏
页码:2238 / 2241
页数:4
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