Introduction to XLOOPS

Details Introduction to XLOOPS Introduction to XLOOPS

1996-11-20

arxiv.org/abs/hep-ph/9611378v1

Nucl.Instrum.Meth.A389:339-342,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, LaTeX, uses epsfig

Scientific paper

10.1016/S0168-9002(97)00123-X

The program package XLOOPS calculates massive one- and two-loop Feynman diagrams. It consists of five parts: i) a graphical user interface ii) routines for generating diagrams from particle input iii) procedures for calculating one-loop integrals both analytically and numerically iv) routines for massive two-loop integrals v) programs for numerical integration of two-loop diagrams. The package relies on the application of parallel space techniques. The treatment of tensor structure and the separation of UV and IR divergences in analytic expressions is described in this scheme. All analytic calculations are performed with MAPLE. Two-loop examples taken from Standard Model calculations are presented. The method has recently been extended to all two-loop vertex topologies, including the crossed topology, graphs with divergent subloops and IR divergent diagrams. This will be included in the XLOOPS package in the near future.

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