!
! Drell-Yan process
!
exec lecture_fig_setup drell_yan 8 8 1 1 1 0.5
set y psize =+0.5
set font -1001
set font title -1004
!
exec lecture_fig_copy 'Drell-Yan Process' 0
!
set tick all off
!
exec lecture_fig_plot
draw line 1 blue = pl
1 7 3 7
draw line 1 blue = pl
3 6.9 7 6.9
draw line 1 blue = pl
3 7.1 7 7.1
draw arrow 1 magenta = pl -4
3 7 4 4
draw circle 1 green = pl 0 100 0
3 7 0.4
draw arrow 1 magenta = pl -4
3 1 4 4
draw sine 1 magenta = pl
4 4 5.5 4
draw arrow 1 magenta = pl -4
5.5 4 7 5.5
draw arrow 1 magenta = pl -4
5.5 4 7 2.5
draw line 1 blue = pl
1 1 3 1
draw line 1 blue = pl
3 1.1 7 1.1
draw line 1 blue = pl
3 0.9 7 0.9
draw circle 1 green = pl 0 100 0
3 1 0.4
comment 1
  new 'P?1!' 1.2 7.3 = = l pl = blue
  new 'xP?1!' 3.7 5.3 = = l pl = magenta
  new 'q^2! > 0'  4.2 3.0 = = l pl = magenta
  new 'P?2!' 1.2 1.3 = = l pl = blue
  new 'x&^_!P?2!' 3.7 2.0 = = l pl = magenta
  new '[m]^+!' 6.8 4.9 = = l pl = magenta
  new '[m]^[-]!' 6.8 3.0 = = l pl = magenta
  new 'Q' 3.0 4.9 = = l pl = magenta
  new 'Q&^[-]!' 3.1 2.8 = = l pl = magenta
end
!
@9 hard epost
@9 close