!
! Gluon exchange diagrams for parton-parton scattering
!
exec lecture_fig_setup gluon_exchange 6 6 3 2 0.2 0.2
set font -1001
set title off
!
exec lecture_fig_copy 'Gluon Exchange' 6
!
set tick all off
!set x grid on all 3
!set y grid on all 3
!
exec lecture_fig_plot 1
draw line 1 black = pl
1 5 5 5
draw line 1 black = pl
1 1 5 1
draw gluon 1 green = pl
3 5 3 1
draw arrow 1 red = pl -1
3.5 3.5 3.5 2.5
comment 1&1 new 'q'       0.9 4.8 = = r pl = black
comment 1&1 new 'q&^_!'   0.9 0.8 = = r pl = black
comment 1&1 new 'g'       2.6 2.8 = = r pl = green
comment 1&1 new 't'       3.8 2.8 = = l pl = red
comment 1&1 new '4/3'     3.0 5.2 = = c pl -1004 magenta
comment 1&1 new '4/3'     3.0 0.4 = = c pl -1004 magenta
!
exec lecture_fig_plot 2
draw line 1 black = pl
1 5 5 5
draw gluon 1 black = pl
1 1 3 1
draw gluon 1 black = pl
3 1 5 1
draw gluon 1 green = pl
3 5 3 1
draw arrow 1 red = pl -1
3.5 3.5 3.5 2.5
comment 1&2 new 'q'       0.9 4.8 = = r pl = black
comment 1&2 new 'g'       0.9 0.8 = = r pl = black
comment 1&2 new 'g'       2.6 2.8 = = r pl = green
comment 1&2 new 't'       3.8 2.8 = = l pl = red
comment 1&2 new '4/3'     3.0 5.2 = = c pl -1004 magenta
comment 1&2 new '3'       3.0 0.4 = = c pl -1004 magenta
!
exec lecture_fig_plot 3
draw gluon 1 black = pl
1 5 3 5
draw gluon 1 black = pl
3 5 5 5
draw gluon 1 black = pl
1 1 3 1
draw gluon 1 black = pl
3 1 5 1
draw gluon 1 green = pl
3 5 3 1
draw arrow 1 red = pl -1
3.5 3.5 3.5 2.5
comment 1&3 new 'g'     0.9 4.8 = = r pl = black
comment 1&3 new 'g'     0.9 0.8 = = r pl = black
comment 1&3 new 'g'     2.6 2.8 = = r pl = green
comment 1&3 new 't'     3.8 2.8 = = l pl = red
comment 1&3 new '3'     3.0 5.3 = = c pl -1004 magenta
comment 1&3 new '3'     3.0 0.4 = = c pl -1004 magenta
!
set x margin =+3
exec lecture_fig_plot 4
draw line 1 black = pl
1 5 2 3
draw line 1 black = pl
1 1 2 3
draw gluon 1 green = pl
2 3 4 3
draw line 1 black = pl
4 3 5 5
draw line 1 black = pl
4 3 5 1
draw arrow 1 red = pl -1
2.5 3.5 3.5 3.5
comment 1&4 new 'q'       0.9 4.8 = = r pl = black
comment 1&4 new 'q&^_!'   0.9 0.8 = = r pl = black
comment 1&4 new 'q'       5.1 4.8 = = l pl = black
comment 1&4 new 'q&^_!'   5.1 0.8 = = l pl = black
comment 1&4 new 's'       3.0 3.7 = = c pl = red
!
!set x margin =+3
exec lecture_fig_plot 5
draw gluon 1 black = pl
1 5 2 3
draw gluon 1 black = pl
1 1 2 3
draw gluon 1 green = pl
2 3 4 3
draw gluon 1 black = pl
4 3 5 5
draw gluon 1 black = pl
4 3 5 1
draw arrow 1 red = pl -1
2.5 3.5 3.5 3.5
comment 1&5 new 'g'      0.9 4.8 = = r pl = black
comment 1&5 new 'g'      0.9 0.8 = = r pl = black
comment 1&5 new 'g'      5.1 4.8 = = l pl = black
comment 1&5 new 'g'      5.1 0.8 = = l pl = black
comment 1&5 new 's'      3.0 3.7 = = c pl = red
!
@9 hard epost
@9 close