MadGraph5_aMC@NLO

Modify parameters in param card using a restriction to load the model

Asked by Ana Rosario Cueto Gomez

Dear experts,

I am using the SMEFTsim_A_U35_MwScheme_UFO model with the massless restriction card.
I would like to use the reweight module and some of the parameters that I would like to vary (all of them in the FRBlock) are set to 1 in the restriction data card and I cannot modify them. Is there any better way to do this that making a copy of the restriction card and changing all the parameters to a different value (excluding 0s and 1s)?

Best regards,
Ana

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

Hi,

You can ask to use a non restricted model within the reweight module (via the "change model" syntax)
but in that case you have to provide a full new param_card.

Otherwise, you can also decide to use a less restricted model tuned to what you want to do.
(You can also contact the author since it does not make that much sense to call a restrict_card "massless" and constraint all the others parameter of the model)

Cheers,

Olivier

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Ana Rosario Cueto Gomez (acueto) said : 		#2

Hi Olivier,

thanks a lot for the suggestions!
It seems that the authors will change it soon in the online UFO files.

Thanks again,
Ana

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Ana Rosario Cueto Gomez (acueto) said : 		#3

Thanks Olivier Mattelaer, that solved my question.