%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 8-4-17 on page 569.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\AtEndDocument{\end{fmffile}}
  \AtBeginDocument{\begin{fmffile}{ftmp}}
\StartShownPreambleCommands
\usepackage{feynmp}
\StopShownPreambleCommands
\begin{document}
\begin{fmfgraph*}(100,60)
 \fmfleftn{i}{2} \fmfrightn{o}{4}
 \fmflabel{$\mathrm{e}^-$}{i1}\fmflabel{$\mathrm{e}^+$}{i2}
 \fmflabel{$\mu^+$}{o1}
 \fmflabel{$\nu_{\mu}$}{o2}
 \fmflabel{$\mathrm{s}$}{o3}
 \fmflabel{$\bar\mathrm{c}$}{o4}
 \fmf{fermion}{i1,v1,i2}
 \fmf{boson,label=$\gamma,,\mathrm{Z}$}{v1,v2}
 \fmf{boson}{v3,v2,v4}
 \fmf{fermion}{o1,v3,o2}
 \fmf{fermion}{o4,v4,o3}
 \fmfdot{v1,v3,v4}\fmfblob{.12w}{v2}
\end{fmfgraph*}
\end{document}