special gamma:(spinor,cspinor,vector).
special gamma5:(spinor,cspinor).
special '(1+gamma5)/2':(spinor,cspinor), '(1-gamma5)/2':(spinor,cspinor).
special moment:(vector).
special '__moment__start__':(vector), '__moment__end__'.
special epsv:(vector,vector,vector,vector).
group color:SU(3).
repres color:(c3/c3b,c8).
SetDefIndex(spinor,color c3, color c8, vector).
special lambda:(color c3, color c3b, color c8).
special f_SU3:(color c8, color c8, color c8).
special d_SU3:(color c8, color c8, color c8).
special eps_c3: (color c3,  color c3,  color c3), 
        eps_c3b:(color c3b, color c3b, color c3b).
let deriv=-i*moment.
let '__deriv__start__'=-i*'__moment__start__'.
let tau1={{0,1},{1,0}}, tau2={{0,i},{-i,0}}, tau3={{1,0},{0,-1}}.
let tau={tau1,tau2,tau3}.
let taup=(tau1+i*tau2)/Sqrt2.
let taum=(tau1-i*tau2)/Sqrt2.
let taupm={taup,tau3,taum}.
let taump={taum,tau3,taup}.
let eps =   {{{0, 0,0}, {0,0,-1}, { 0,1,0}},
             {{0, 0,1}, {0,0, 0}, {-1,0,0}}, 
             {{0,-1,0}, {1,0, 0}, { 0,0,0}}}.
let epspm=  {{{0, 0,0}, {0,0,-i}, {0,i,0}},
             {{0,0,i}, {0,0,0}, {-i,0,0}},
             {{0,-i,0},{i,0,0}, {0,0,0}}}.
let 	Tau1={{0,-1,0},{-1,0,1},{0,1,0}}/Sqrt2,
	Tau2={{0,-i,0},{i,0,i},{0,-i,0}}/Sqrt2,
	Tau3={{1,0,0},{0,0,0},{0,0,-1}}.
let Tau={Tau1,Tau2,Tau3}.
let Taup=(Tau1+i*Tau2)/Sqrt2, Taum=(Tau1-i*Tau2)/Sqrt2.
let Taupm={Taup,Tau3,Taum}.
let Taump={Taum,Tau3,Taup}.

option TexFileStart=[
		'\\documentstyle[12pt]{article}',
 		'\\textwidth 17cm',
		'\\textheight 25cm',
		'\\hoffset -3cm',
		'\\voffset -1cm',
		'\\pagestyle{empty}',
 		'\\begin{document}',
		'\\begin{center}',0 ],
       TexFileEnd=[0,
		'\\end{center}',
		'\\end{document}',0].
 
do_if FeynArts==1.
read 'feynarts.rc'.
end_if.
