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HELAC: a package to compute electroweak helicity amplitudes

Aggeliki Kanaki·Costas G. Papadopoulos
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Abstract

HELAC is a FORTRAN based package that is able to compute efficiently helicity amplitudes for arbitrary scattering processes within the standard electroweak theory. The algorithm exploits the virtues of the Dyson-Schwinger equations as compared to the traditional Feynman graph approach. All electroweak vertices are included in both the unitary and Feynman gauges, and computations including all mass effects are available. A version performing multi-precision computations with arbitrary - user defined - accuracy is also included, allowing access to any phase space point for arbitrary high energies.

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Aggeliki Kanaki, Costas G. Papadopoulos. 2000-02-09. HELAC: a package to compute electroweak helicity amplitudes. https://doi.org/10.1016/s0010-4655(00)00151-x

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