MadGraph5_aMC@NLO

run_card missing in loop induced processes

Asked by Warsimakram I K

when I am generating the process-
 generate g g > h g [virt=QCD] ,
after launching, I am not getting the option to edit run_card.
I am using MG5_aMC_v3.2.0

Thanks in advance.

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

Yes this is expected since that syntax is reserved for the evaluation of single (or a collection) of phase-space point.
They are no PDF linked in the associated output, no running of the parameter and no phase-space integrator designed for the process in the associated output. Consequently, a run_card will be meaningless for such syntax.

I guess that you are looking for the loop-induced cross-section for your process ( arxiv:1507.00020 )
which should then be
generate g g > h g [noborn=QCD]

Cheers,

Olivier

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Warsimakram I K (wasimik) said : 		#2

Thanks Olivier Mattelaer, that solved my question.