MadGraph5_aMC@NLO

Switching off NLO

Asked by JohnShiu

Hi,

  I would like MG5 to calculate cross-section at leading order only. When I ./bin/generate_events, I don't see any options for me to switch off the NLO. How can I switch it off?

Best,
  John

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi John,

If you generate your process without the flag [QCD], then the generated code is a pure LO one and you do not have the possibility to run NLO computation.
On the other hand, if you add that flag, then the generated code contains both the LO and NLO peace of the computation and in that case, you will have the opportunity to choose if you want to run at LO or at NLO.

Cheers,

Olivier

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