D0C : A code to calculate scalar one-loop four-point integrals with complex masses

Details D0C : A code to calculate scalar one-loop four-point integrals with complex masses D0C : A code to calculate scalar one-loop four-point integrals with complex masses

2009-02-02

arxiv.org/abs/0902.0325v2

Comput.Phys.Commun.180:2258-2267,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version published in CPC

Scientific paper

10.1016/j.cpc.2009.07.012

We present a new Fortran code to calculate the scalar one-loop four-point integral with complex internal masses, based on the method of 't Hooft and Veltman. The code is applicable when the external momenta fulfill a certain physical condition. In particular it holds if one of the external momenta or a sum of them is timelike or lightlike and therefore covers all physical processes at colliders. All the special cases related to massless external particles are treated separately. Some technical issues related to numerical evaluation and Landau singularities are discussed.

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