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%  simplified QCD with neither flavour nor colour indices


%  propagators

  [ quark, antiquark, - ]

  [ gluon, gluon, + ]

  [ ghost, antighost, - ]



%  vertices

  [ antiquark, quark, gluon ]

  [ gluon, gluon, gluon ]

  [ gluon, gluon, gluon, gluon ]

  [ antighost, ghost, gluon ]

