% !TEX program = pdflatexmk
% !TEX parameter = -shell-escape
% Author: Izaak Neutelings (October 24)
% Instructions: To compile via command line, run the following twice
%   pdflatex -shell-escape extract/higgs_pp$TAG.tex
\documentclass[11pt,border=4pt]{standalone}
\usepackage{feynmp-auto}
\begin{document}
\begin{fmffile}{feyngraph}
  \fmfframe(-4,10)(-2,10){ % padding (L,T)(R,B)
  \begin{fmfgraph*}(120,75) % dimensions (WH)
    % line style
    \fmfset{wiggly_len}{12} % boson wavelength
    \fmfset{wiggly_slope}{65} % boson slope of waves
    %\fmfset{dash_len}{9} % dashes length
    % external vertices
    \fmfleft{i2,i1}
    \fmfright{o2,o1}
    % initial state
    \fmf{gluon}{v1,i1}
    \fmf{fermion}{i2,v2}
    % t-channel
    \fmf{gluon,t=0.7}{v2,v1} % t-channel
    % final state
    \fmf{dashes}{o1,v1} % Higgs
    \fmf{fermion}{v2,o2}
    % Higss coupling
    \fmfforce{vloc(__v1)}{v1'} % copy point
    \fmfv{decor.shape=circle,decor.filled=empty,decor.size=9}{v1}
    \fmfv{decor.shape=cross,decor.filled=empty,decor.size=9}{v1'}
    % labels
    \fmfv{l.a=158,l.d=6,l=$g$}{i1}
    \fmfv{l.a=-158,l.d=6,l=c}{i2}
    \fmfv{l.a=22,l.d=6,l=h}{o1}
    \fmfv{l.a=-22,l.d=6,l=c}{o2}
  \end{fmfgraph*}
  } % close \fmfframe
\end{fmffile}
\end{document}