Simple formula for the infrared singular part of the integrand of one-loop QCD amplitudes
Simple formula for the infrared singular part of the integrand of one-loop QCD amplitudes
复制标题
单环QCD振幅被积函数红外奇异部分的简单公式
DOI:
10.1103/physrevd.81.094002
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发表时间:
2009
影响因子:
5
通讯作者:
S. Weinzierl
中科院分区:
文献类型:
--
作者:
M. Assadsolimani;S. Becker;S. Weinzierl
We show that a well-known simple formula for the explicit infrared poles of one-loop QCD amplitudes has a corresponding simple counterpart in unintegrated form. The unintegrated formula approximates the integrand of one-loop QCD amplitudes in all soft and collinear singular regions. It thus defines a local counterterm for the infrared singularities and can be used as an ingredient for the numerical calculation of one-loop amplitudes.