1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 8-4-21 on page 572.
%%
%% Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{111.83385pt}
\AtEndDocument{\end{fmffile}}
\AtBeginDocument{\begin{fmffile}{ftmp}}
\StartShownPreambleCommands
\usepackage{feynmp}
\StopShownPreambleCommands
\begin{document}
\begin{fmfgraph*}(90,70)
\fmfleft{i1,i2} \fmfright{o1}
\fmf{photon,tension=4}{i1,v1} \fmf{photon,tension=4}{i2,v3}
\fmf{photon,tension=4}{v2,o1}
\fmfcyclen{fermion,tension=1}{v}{3}
\fmf{fermion,tension=1,left=1.4/3}{v1,v3}
\fmf{fermion,tension=1,left=2/3}{v3,v2}
\fmf{fermion,tension=1,left=2/3}{v2,v1}
\end{fmfgraph*}
\end{document}
|