\documentclass[a4,12pt]{article} 
\usepackage[warn]{mathtext}
\usepackage[T2A]{fontenc}
\usepackage[koi8-r]{inputenc}
\usepackage[english,russian]{babel}
\usepackage{indentfirst}%first paragraph indent
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{floatflt}
\usepackage{wrapfig}
\usepackage{afterpage}
\usepackage{srcltx}
\usepackage{latexsym} 
%\usepackage{sparticles}         %Package for displaying sparticle names. 
\usepackage{feynmp}             %Package for feynman diagrams. 
% : -> . in caption 
\usepackage[centerlast,small]{caption2}
\renewcommand{\captionlabeldelim}{.}
\usepackage{xspace}

%backslash
\newcommand{\bs}{\symbol{'134}}
%degree
\newcommand{\grad}{\ensuremath{{}^{\circ}}\xspace}

\newcommand{\ee}{\ensuremath{{e^{+}e^{-}}}\xspace}
\newcommand{\mumu}{\ensuremath{{\mu^{+}\mu^{-}}}\xspace}
\newcommand{\tautau}{\ensuremath{\tau^{+}\tau^{-}}\xspace}
\newcommand{\pipi}{\ensuremath{\pi^{+}\pi^{-}}\xspace}
\newcommand{\lele}{\ensuremath{\ell^{+}\ell^{-}}\xspace}
\newcommand{\hadr}{\ensuremath{hadrons}\xspace}
\newcommand{\JP}{\ensuremath{J/\psi\,}\xspace}
\newcommand{\PP}{\ensuremath{\psi'}\xspace}
\renewcommand{\epsilon}{\varepsilon}

\begin{document}
\thispagestyle{empty}
\begin{fmffile}{ee-psi-hadr}
  \begin{fmfgraph*}(110,62) %Sets size of Diagram
    \fmfleft{i1,i2}     %Sets there to be 2 sources 
    \fmfright{o1,o2}    %Sets there to be 2  outputs
    \fmflabel{$e^-$}{i1} %Labels one of the left sources
    \fmflabel{$e^+$}{i2} %Labels one of the left sources
    \fmflabel{$q^+$}{o1} %Labels one of the right outputs
    \fmflabel{$q^-$}{o2} %Labels one of the right outputs
%    \fmf{fermion}{i1,v1,i2} %Connects the sources with a vertex.
    \fmf{fermion,foreground=green}{i1,v1} %Connects the sources with a vertex.
    \fmf{fermion,foreground=red}{v1,i2} %Connects the sources with a vertex.
    \fmf{fermion,foreground=green}{o1,v2,v3,v4,v5}
    \fmf{fermion,foreground=red}{v5,v6,v7,v8,o2}
    \fmf{heavy,label=$J/\psi$,tension=1/3,fore=red+green}{v1,v5}
    \fmffreeze
    \fmf{gluon,foreground=blue}{v2,v8} 
    \fmf{gluon,foreground=blue}{v3,v7} 
    \fmf{gluon,foreground=blue}{v4,v6} 
    \fmfv{label=$\Gamma_{\ee}$}{v1} %Labels 
    \fmfv{label=$Br_{\hadr}$,label.dist=0.3w}{v5} %Labels 
  \end{fmfgraph*}
\end{fmffile}
\end{document}

