SpinorsExtras - Mathematica implementation of massive spinor-helicity formalism
arXiv:1406.5612
Abstract
We present SpinorsExtras package implementing massive spinor-helicity formalism in Mathematica on top of S@M package. Package defines new objects for Mathematica - massive spinors and reference, associated and polarization vectors. Various properties of introduced symbols and relations among them are implemented together with functions to manipulate and interchange such objects. The package can be used for symbolic calculation of helicity amplitudes involving massive particles with real or complex momenta, using on- or off-shell recursive techniques or Feynman diagrams.
arXiv comment35 pages, package can be downloaded from http://www.fuw.edu.pl/~jkuczm/SpinorsExtras/, source code available at https://github.com/jkuczm/SpinorsExtras, package extends program presented in arXiv:hep-ph/0710.5559
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