% !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$TAG.tex
\documentclass[11pt,border=4pt]{standalone}
\usepackage{feynmp-auto}
\usepackage{xcolor}
\definecolor{colVH}{rgb}{.1,.5,.1} % Higgs strahlung (green)
\definecolor{colkappaV}{rgb}{.15,.75,.15} % kappa_V (green)
\begin{document}
\begin{fmffile}{feyngraph}
  \fmfframe(4,12)(10,10){ % padding (L,T)(R,B)
  %\color{colVH} % green text color
  %\fmfcmd{foreground:=(0.1,0.5,0.1);} % green line color
  \begin{fmfgraph*}(160,50) % dimensions (WH)
    % line style
    \fmfset{wiggly_len}{12} % boson wavelength
    \fmfset{wiggly_slope}{65} % boson slope of waves
    % external vertices
    \fmfstraight
    \fmfleft{i2,i1}
    \fmfright{o2,m,o1}
    % gluons
    \fmf{gluon}{i2,t2}
    \fmf{gluon}{t1,i1}
    \fmf{phantom,t=0.4}{t1,o1,o2,t2} % pull gluons right
    \fmffreeze
    % top triangle loop
    \fmf{fermion}{t2,t3,t1}
    \fmf{fermion,l.s=right,label=t}{t1,t2}
    \fmf{phantom,t=1.3}{t3,m} % pull triangle right
    \fmffreeze % fix triangle
    % V -> VH
    \fmf{boson,l.s=left,label=$V^*$}{t3,h}
    \fmf{boson,t=0.8}{h,o1}
    \fmf{dashes,t=0.8}{h,o2}
    % Higss coupling
    \fmfv{decor.shape=circle,decor.filled=full,decor.size=4,f=(.15,,.75,,.15),
          l.d=6,l.a=-110,l=\color{colkappaV}$\kappa_V$\hspace{3pt}}{h} % finetune with \hspace
    % labels
    \fmflabel{$g$}{i1}
    \fmflabel{$g$}{i2}
    \fmfv{l.a=24,l.d=5,l=$V$}{o1}
    \fmfv{l.a=-22,l.d=5,l=h}{o2}
  \end{fmfgraph*}
  } % close \fmfframe
\end{fmffile}
\end{document}