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

## Description

Abstract 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 approac... Title of program: golem95-1.2.0 Catalogue Id: AEEO_v2_0 Nature of problem Evaluation of one-loop multi-leg integrals occurring in the calculation of next-to-leading order corrections to scattering amplitudes in elementary particle physics. In the presence of massive particles in the loop, propagators going on-shell can cause singularities which should be regulated to allow for a successful evaluation. Versions of this program held in the CPC repository in Mendeley Data AEEO_v1_0; golem95_v1.0; 10.1016/j.cpc.2009.06.024 AEEO_v2_0; golem95-1.2.0; 10.1016/j.cpc.2011.05.015 AEEO_v3_0; golem95-1.3.0; 10.1016/j.cpc.2014.03.009 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)