First results with a new method for calculating 2-loop box-functions

被引：0
|
作者：
Kreckel R. [1 ]
Kreimer D. [1 ]
Schilcher K. [1 ]
机构：
[1] Johannes Gutenberg-Universität, Institut für Physik / WA ThEP
来源：
The European Physical Journal C - Particles and Fields | 1999年 / 6卷 / 4期
关键词：
Rational Function; Integral Representation; Finite Volume; Internal Mass; Residue Theorem;
D O I：
10.1007/s100529800947
中图分类号：
学科分类号：
摘要：
We describe a first attempt to calculate scalar 2-loop box-functions with arbitrary internal masses, applying a novel method proposed in [1]. Four of the eight integrals are accessible to integration by means of the residue theorem, leaving a rational function in the remaining variables. The result of the procedure is a three-or sometimes two-dimensional integral representation over a finite volume that can be further evaluated using numerical methods.
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页码：693 / 699
页数：6
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