MadGraph5_aMC@NLO

Reweighting NLO process generated with SMEFT model

Asked by Jay Sandesara

Hello,

I am trying to do reweighting for different EFT parameter values in the p p -> h -> l+ l- l+ l- process generated using SMEFT@NLO package. However upon running the reweight card, no matter what its contents are, I get the following output:

REWEIGHT: Running Reweighting
REWEIGHT: detected model: SMEFTatNLO_U2_2_U3_3_cG_4F_LO_UFO-full. Loading...
REWEIGHT: generating the square matrix element for reweighting
REWEIGHT: generate p p > h > l+ l- l+ l- NP=2 QED=4 QCD=4 --no_warning=duplicate;define pert_QCD = -5 -4 -3 -2 -1 1 2 3 4 5 21;add process p p > h > l+ l- l+ l- pert_QCD NP=2 QED=4 QCD=5 --no_warning=duplicate;
REWEIGHT: RETRY with generate p p > h > l+ l- l+ l- NP=2 QED=4 QCD=4 [virt=QCD] ;
REWEIGHT: Original cross-section: 0.33477058 +- 0.0041088952 pb
REWEIGHT: Computed cross-section:
REWEIGHT: gzipping output file: events.lhe

Where it asks me to retry using generate p p > h > l+ l- l+ l- NP=2 QED=4 QCD=4 [virt=QCD] .

How do I resolve this issue?

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

I do not know,

I'm trying to reproduce the issue with the following script:

import model SMEFTatNLO_U2_2_U3_3_cG_4F_LO_UFO-full
generate p p > h > l+ l- l+ l- NP=2 QED=4 QCD=4 [QCD]
output
launch
reweight=ON
set nevents 100

But I'm not even sure if you are doing a NLO or LO reweighting...
Do you have the issue with the script above (I will update when I have the result for the above script)

Cheers,

Olivier

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Jay Sandesara (jaysandesara) said : 		#2

Hey,

Yes, I am using a similar script. Interestingly, I am getting this issue only with v2.6.7 . Coincidentally, I ran it on my old setup with v2.6.5, and it ran as I expected.

Can you help with this problem?

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