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Golem95C: A library for one-loop integrals with complex masses

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arxiv 1101.5595 v1 pith:NXRPBT3T submitted 2011-01-28 hep-ph

G.Cullen , J.-Ph.Guillet , G.Heinrich , T.Kleinschmidt , E.Pilon , T.Reiter , M.Rodgers This is my paper · ORCID
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keywords integralsmassesone-loopamplitudescomplexlibrarynumericalprogram
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We present a program for the numerical evaluation of scalar integrals and tensor form factors entering the calculation of one-loop amplitudes which supports the use of complex masses in the loop integrals. The program is built on an earlier version of the golem95 library, which performs the reduction to a certain set of basis integrals using a formalism where inverse Gram determinants can be avoided. It can be used to calculate one-loop amplitudes with arbitrary masses in an algebraic approach as well as in the context of a unitarity-inspired numerical reconstruction of the integrand.

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  1. One-Loop Calculations in Effective Field Theories with GoSam-3.0

    hep-ph 2025-07 accept novelty 6.0 of 10

    GoSam-3.0 extends automated one-loop amplitude generation to SMEFT and HEFT with flexible truncation orders, loop-suppression counting, and improved speed and stability.

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