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Numerical evaluation of multi-gluon amplitudes for high energy factorization. (English) Zbl 1360.81014
Summary: We present a program to evaluate tree-level multi-gluon amplitudes with up to two of them off-shell. Furthermore, it evaluates squared amplitudes summed over colors and helicities for up to six external gluons. It employs both analytic expressions, obtained via BCFW recursion, and numerical BCFW recursion. It has been validated numerically with the help of an independent program employing numerical Dyson-Schwinger recursion.

MSC:
81-04 Software, source code, etc. for problems pertaining to quantum theory
81V05 Strong interaction, including quantum chromodynamics
81-08 Computational methods for problems pertaining to quantum theory
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