1997/09/29 by Alexander Frink, Frink, A., Jürgen Körner +3
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.hep-ph/9709490
openalex publication_date 1997/09/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We describe in some detail the present features of an automatic loop calculation program as well as the integration techniques that go into it. The program, called XLOOPS 1.0, allows one to calculate massive one- and two-loop Feynman diagrams in the Standard Model including their tensor structure. UV divergences in UV divergent integrals are explicitly computed in dimensional regularization. One-loop integrals are calculated analytically in d ≠ 4 dimensions whereas two-loop integrals are reduced to two-fold integral representations which the program evaluates numerically. We discuss Higgs decay at the two-loop level as a first application of the novel integration techniques that are incorporated into XLOOPS.