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Mandal, Manoj K.; Zhao, Xiaoran
The journal of high energy physics, 03/2019, Letnik: 2019, Številka: 3Journal Article
A bstract The computation of Feynman integrals is often the bottleneck of multi-loop calculations. We propose and implement a new method to efficiently evaluate such integrals in the physical region through the numerical integration of a suitable set of differential equations, where the initial conditions are provided in the unphysical region via the sector decomposition method. We present numerical results for a set of two-loop integrals, where the non-planar ones complete the master integrals for gg → γγ and q q ¯ → γγ scattering mediated by the top quark.
