Papers › ftint: Calculating gradient-flow integrals with pySecDec
ftint: Calculating gradient-flow integrals with pySecDec
Robert V. Harlander, Theodoros Nellopoulos, Anton Olsson, Marius Wesle
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The program ftint is introduced which numerically evaluates dimensionally regulated integrals as they occur in the perturbative approach to the gradient-flow formalism in quantum field theory. It relies on sector decomposition in order to determine the coefficients of the individual orders in ϵ=(4-D)/2, where D is the space-time dimension. For that purpose, it implements an interface to the public library pySecDec. The current version works for massive and massless integrals up to three-loop level with vanishing external momenta, but the underlying method is extendable to more general cases.
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