Numerical evaluation of multi-loop integrals for arbitrary kinematics with SecDec 2.0

Details Numerical evaluation of multi-loop integrals for arbitrary kinematics with SecDec 2.0 Numerical evaluation of multi-loop integrals for arbitrary kinematics with SecDec 2.0

2012-04-18

arxiv.org/abs/1204.4152v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 11 figures

Scientific paper

We present the program SecDec 2.0 which contains various new features: First, it allows the numerical evaluation of multi-loop integrals with no restriction on the kinematics. Dimensionally regulated ultraviolet and infrared singularities are isolated via sector decomposition, while threshold singularities are handled by a deformation of the integration contour in the complex plane. As an application we present numerical results for various massive two-loop four-point diagrams. SecDec 2.0 also contains new useful features for the calculation of more general parameter integrals, related e.g. to phase space integrals.

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