% mod_tex: distributed LaTeX-rendering over Apache % Copyright (C) 2007 Peter Danenberg % See doc/COPYING for details. \documentclass[12pt]{article} \usepackage[nonstop]{feynmp} \unitlength=1mm \pagestyle{empty} \begin{document} \begin{fmffile}{feyn-mp} \begin{fmfchar*}(40,25) \begin{fmfgraph*}(40,25) \fmfpen{thick} \fmfleft{i1,d1} \fmfright{o1,d2} \fmfn{plain}{i}{4} \fmf{plain}{i4,v,o4} \fmfn{plain}{o}{4} \fmffreeze \fmf{gluon,left,fore=red}{i1,o1} \fmf{gluon,left,fore=green}{i2,o2} \fmf{gluon,left,fore=blue}{i3,o3} \fmfdotn{i}{3} \fmfdotn{o}{3} \fmfv{d.sh=circle,d.f=empty,d.si=.2w,b=(1,,0,,1), l=$\Sigma$,l.d=0}{v} \end{fmfgraph*} \end{fmfchar*} \end{fmffile} \end{document}