COLLIER --一个单圈积分函数库
COLLIER -- A fortran-library for one-loop integrals
摘要：
我们介绍了用于微扰相对论量子场论中单圈标量和张量积分数值计算的COLLIER库。重要的功能是实现专用的方法来实现3点和4点张量积分的数值稳定性，支持内部粒子的复杂质量，以及在红外奇异性的维度和质量正则化之间进行选择的可能性。COLLIER支持单圈N点函数，目前N=6，并已在各种NLO QCD和EW计算中进行了测试。
英文摘要：
We introduce the fortran-library COLLIER for the numerical evaluation of one-loop scalar and tensor integrals in perturbative relativistic quantum field theories. Important features are the implementation of dedicated methods to achieve numerical stability for 3- and 4-point tensor integrals, the support of complex masses for internal particles, and the possibility to choose between dimensional and mass regularization for infrared singularities. COLLIER supports one-loop N-point functions up to currently N=6 and has been tested in various NLO QCD and EW calculations.
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