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32 lines
1.1 KiB
32 lines
1.1 KiB
\documentclass{article}
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\usepackage[paperheight=80mm,paperwidth=95mm, margin=5mm]{geometry}
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\usepackage{feynmp-auto}
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\addtolength{\oddsidemargin}{-10mm}
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\addtolength{\evensidemargin}{-10mm}
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% commas in feynmp sometimes lead to strange errors, use \comma instead
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\DeclareMathSymbol{\comma}{\mathpunct}{letters}{"3B}
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\begin{document}\LARGE
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\centering
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\begin{fmffile}{O1_a_diagram} \centering
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\begin{fmfgraph*}(300,180)
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\fmfstraight
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\fmfleft{l0,l1,l2,l3,l4}
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\fmfright{r0,r1,r2,r3,r4}
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\fmf{phantom}{l1,w1,r1}
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\fmf{phantom}{l3,v1,r3}
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\fmffreeze
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\fmf{fermion,label=$u$,label.side=left}{l4,v1}
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\fmf{fermion,label=$s$,label.side=left}{v1,r4}
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\fmf{photon,label=$W$,tension=1.0,label.side=right}{v1,w1}
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\fmf{fermion,label=$d$,label.side=right}{l0,w1}
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\fmf{fermion,label=$u$,label.side=right}{w1,r0}
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\end{fmfgraph*}
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\end{fmffile}
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\pagestyle{empty}
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\end{document}
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