MadGraph5_aMC@NLO

Add new cuts in run_card

Asked by Costanza Carrivale

Hi!
I'm using MadGraph5 for the generation of the process "p p -> l+ l+ vl vl j j QCD=0".
I see that in the run_card it's possible to apply cuts to many variables. I would ask you where these variables are defined and if it's possible (and, in case, how) to add new customized variables to the list (in my case, I'd like to introduce a cut on the square of the sum of quadrimomenta of leptons and neutrinos).
Thanks!

Costanza

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MadGraph5_aMC@NLO Edit question
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Solved by:
Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

Did you check: https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/FAQ-General-1

Be careful that adding cut (especially strong cut) can create issue with the efficiency of the phase-space generator (which can in some cases misses some contribution and bias the cross-section computation).

Cheers,

Olivier

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Costanza Carrivale (criotnalmee) said : 		#2

Thanks Olivier Mattelaer, that solved my question.