S@M, a Mathematica Implementation of the Spinor-Helicity Formalism

Details S@M, a Mathematica Implementation of the Spinor-Helicity Formalism S@M, a Mathematica Implementation of the Spinor-Helicity Formalism

2007-10-30

arxiv.org/abs/0710.5559v2

Comput.Phys.Commun.179:501-574,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

52 pages, the package can be downloaded from http://www.slac.stanford.edu/grp/th/software/#Mathematica_Packages_

Scientific paper

10.1016/j.cpc.2008.05.002

In this paper we present the package S@M (Spinors@Mathematica) which implements the spinor-helicity formalism in Mathematica. The package allows the use of complex-spinor algebra along with the multi-purpose features of Mathematica. The package defines the spinor objects with their basic properties along with functions to manipulate them. It also offers the possibility of evaluating the spinorial objects numerically at every computational step. The package is therefore well suited to be used in the context of on-shell technology, in particular for the evaluation of scattering amplitudes at tree- and loop-level.

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