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Tools for NLO automation: Extension of the golem95C integral library
Authors:J.Ph. Guillet  G. Heinrich  J.F. von Soden-Fraunhofen
Affiliation:1. LAPTH, Université de Savoie and CNRS, Annecy-le-Vieux, France;2. Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
Abstract:We present an extension of the program golem95C for the numerical evaluation of scalar integrals and tensor form factors entering the calculation of one-loop amplitudes, which supports tensor ranks exceeding the number of propagators. This extension allows various applications in Beyond the Standard Model physics and effective theories, for example higher ranks due to propagators of spin two particles, or due to effective vertices. Complex masses are also supported. The program is not restricted to the Feynman diagrammatic approach, as it also contains routines to interface to unitarity-inspired numerical reconstruction of the integrand at the tensorial level. Therefore, it can serve as a general integral library in automated programs to calculate one-loop amplitudes.
Keywords:NLO computations   One-loop diagrams   Tensor integrals   Higher spin representations   Effective theories
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