A large discrepancy between an original and reweighted cross-section
Hi,
I am trying to do a simple validation exercise for EFT re-weighting using mg5 v3.0.3-betternlops. I first generate an EFT process using the simple command:
-- >
import model dim6top_
generate g g > t t~ h FCNC=0 DIM6^2==1 DIM6_ctG^2==1
<--
The cross-section of this process is around 0.265 pb.
Then, I generate the same process in the SM using: generate g g > t t~ h and then set the re-weight card to:
-->
change mode LO
change model /home/elfaham/
change process g g > t t~ h FCNC=0 DIM6^2==1 DIM6_ctG^2==1
change output 2.0
launch
/home/elfaham/
<--
I am expecting that the latter re-weighted process would generate the same cross-section as the former process. However, the cross-section of this re-weighted process is around 0.12pb (compared to 0.265pb for the former one).
I am wondering if I am doing something wrong here, your help is appreciated.
Thanks,
Hesham
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