% !TEX program = pdflatexmk
% !TEX parameter = -shell-escape
% Author: Izaak Neutelings (September 24)
% Instructions: To compile via command line, run the following twice
%   pdflatex -shell-escape extract/higgs_pair_pp$TAG.tex
\documentclass[11pt,border=4pt]{standalone}
\usepackage{feynmp-auto}
\begin{document}
\begin{fmffile}{feyngraph}
  \fmfframe(3,12)(8,12){ % padding (L,T)(R,B)
  \begin{fmfgraph*}(110,65) % dimensions (WH)
    % line style
    \fmfset{wiggly_len}{12} % boson wavelength
    \fmfset{wiggly_slope}{65} % boson slope of waves
    % external vertices
    \fmfstraight
    \fmfleft{i2,i1}
    \fmfright{o2,o1}
    % gluons
    \fmf{gluon}{v,i1}
    \fmf{gluon}{i2,v}
    \fmfblob{20}{v}
    % Higgs boson
    \fmf{dashes,t=1.3}{v,h}
    \fmf{dashes}{h,o1}
    \fmf{dashes}{h,o2}
    % labels
    \fmfv{l.a=150,l.d=4,l=$g$}{i1}
    \fmfv{l.a=-150,l.d=5,l=$g$}{i2}
    \fmfv{l.a=30,l.d=3,l=$h$}{o1}
    \fmfv{l.a=-28,l.d=2,l=$h$}{o2}
  \end{fmfgraph*}
  } % close \fmfframe
\end{fmffile}
\end{document}