% !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$TAG.tex
\documentclass[11pt,border=4pt]{standalone}
\usepackage{feynmp-auto}
\usepackage{xcolor}
\definecolor{colVH}{rgb}{.1,.5,.1} % Higgs strahlung (green)
\definecolor{colkappaf}{rgb}{1,0,0} % kappa_q (red)
\begin{document}
\begin{fmffile}{feyngraph}
  \fmfframe(-7,11)(-2,14){ % padding (L,T)(R,B)
  %\color{colVH} % green text color
  %\fmfcmd{foreground:=(0.1,0.5,0.1);} % green line color
  \begin{fmfgraph*}(165,45) % dimensions (WH)
    % line style
    \fmfset{wiggly_len}{12} % boson wavelength
    \fmfset{wiggly_slope}{65} % boson slope of waves
    % external vertices
    \fmfleft{i2,i1}
    \fmfright{o2,o1}
    % incoming gluons
    \fmf{gluon}{v1,i1}
    \fmf{gluon}{i2,v2}
    % top box loop
    \fmf{fermion,t=1}{v1,v}
    \fmf{fermion,t=0}{v,h}
    \fmf{fermion,t=1}{h,v2}
    \fmf{fermion,t=0,l.s=left,label=t}{v2,v1}
    % outgoing bosons
    \fmf{boson}{v,o1}
    \fmf{dashes}{h,o2} % Higgs
    % Higss coupling
    \fmfv{decor.shape=circle,decor.filled=full,decor.size=4,f=(1,,0,,0),
          l.d=6,l.a=-90,l=\color{colkappaf}$\kappa_\mathrm{t}$}{h}
    % labels
    \fmfv{l.a=170,l.d=5,l=$g$}{i1}
    \fmfv{l.a=-170,l.d=5,l=$g$}{i2}
    \fmfv{l.a=10,l.d=5,l=$V$}{o1}
    \fmfv{l.a=-10,l.d=5,l=h}{o2}
  \end{fmfgraph*}
  } % close \fmfframe
\end{fmffile}
\end{document}