• pp-ww(background).png:
  

• Pp-ww(background).png:
  

Elliot Lipeles' (lipeles@fnal.gov) ran the same leading order process
in MCFM:
sigma(ppbar->WW) = 8508.913 +/- 39.551 fb
sigma(pp->WW) = 3122.108 +/- 15.252 fb

Summing the sub process total cross sections yielded from comphep
produces:
sigma(pp->WW) = 3.2930 +/- 0.2795 pb
sigma(ppbar->WW) = 8.7719 +/- 0.2693 pb

Conclusion: The difference in scale between the graphs, and the fact that
the total cross sections do not match the expected values for pp,ppbar->WW
production at 2TeV is shown to be a result of comphep being a leading order only generator.

-- BruceThayre - 11 Aug 2006