
%%%%%%%%%%%%%%%%%%%%%% Feynman diagram for TChiHZ

\documentclass[border={0pt 20pt 0pt 20pt}]{standalone}
\usepackage{feynmp}
\DeclareGraphicsRule{*}{mps}{*}{} % for being able to read the produced file



%%%%%%%%%%%%%%%%%%%%%%%%%%% Document %%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\thispagestyle{empty}

\Large
%%%%%%%% THE NAME OF THE fmffile HAS TO BE ``Feynman<filename>'' TO USE compile.py %%%%%%%%%%%%%%%
\begin{fmffile}{feyngraph}
  \begin{fmfgraph*}(250,100)
    \fmfleft{i1,i2}
    \fmfright{o1,o2}

    % gluons
    \fmf{phantom}{i1,v1,v2,o1}
    \fmf{phantom}{i2,v1,v2,o2}
    \fmffreeze

    \fmf{gluon}{i1,v1}
    \fmf{fermion}{i2,v1}
    \fmf{fermion,label=b}{v1,v2}
    \fmf{fermion}{v2,o1}
    \fmf{photon}{v2,o2}
    
    % labels
    \fmflabel{g}{i1}
    \fmflabel{b}{i2}
    \fmflabel{t}{o1}
    \fmflabel{W}{o2}
  \end{fmfgraph*}
\end{fmffile}

\end{document}
