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

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

2011-01-28

arxiv.org/abs/1101.5595v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 3 figures

Scientific paper

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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