% !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_pp$TAG.tex
\documentclass[11pt,border=4pt]{standalone}
\usepackage{feynmp-auto}
\usepackage{xcolor}
\definecolor{colqqH}{rgb}{.8,.1,.9} % Higgs with associated quarks (magenta)
\definecolor{colkappaf}{rgb}{1,0,0} % kappa_q (red)
\begin{document}
\begin{fmffile}{feyngraph}
  \fmfframe(-7,12)(8,12){ % padding (L,T)(R,B)
  %\color{colqqH} % magenta text color
  %\fmfcmd{foreground:=(.9,.1,.9);} % magenta line color
  \begin{fmfgraph*}(130,65) % dimensions (WH)
    % line style
    \fmfset{wiggly_len}{12} % boson wavelength
    \fmfset{wiggly_slope}{65} % boson slope of waves
    % external vertices
    \fmfleft{i2,m,i1}
    \fmfright{o2,h,o1}
    % skeleton - gg -> tt
    \fmf{gluon}{v1,i1}
    \fmf{gluon}{i2,v2}
    \fmf{fermion}{v1,o1}
    \fmf{fermion}{o2,v2}
    \fmffreeze
    % VV -> H
    \fmf{fermion}{v2,v,v1}
    \fmf{dashes,t=0}{v,h} % Higgs
    % Higss coupling
    \fmfv{decor.shape=circle,decor.filled=full,decor.size=4,f=(1,,0,,0),
          l.d=5,l.a=185,l=\color{colkappaf}$\kappa_\mathrm{t}$}{v}
    % labels
    \fmfv{l.a=158,l.d=6,l=$g$}{i1}
    \fmfv{l.a=-158,l.d=6,l=$g$}{i2}
    \fmfv{l.a=4,l.d=3,l=h}{h}
    \fmfv{l.a=10,l.d=6,l=\strut t}{o1}
    \fmfv{l.a=-8,l.d=6,l=\strut$\overline{\mathrm{t}}$}{o2}
  \end{fmfgraph*}
  } % close \fmfframe
\end{fmffile}
\end{document}