Problems with decay with squared ordered constraints

Asked by Shankha Banerjee


Perhaps this has been asked before. We are using the SMEFTsim model from the FeynRules database to generate the following process:

define w = w+ w-
generate p p > w z NP=1 NP^2=1 QCD=0

Because this process wasn't allowing for a decay chain, we tried to use MadSpin to decay the W and the Z-bosons but we are getting the same issue:

INFO: generate p p > w z NP=1 NP^2=1, z > l l QCD=99, w > l v QCD=99 --no_warning=duplicate;
Command "generate_events -f" interrupted with error:
MadGraph5Error : Decay processes cannot specify squared orders constraints.
Please report this bug on
More information is found in '/mt/batch/sbanerjee/Packages/MG5_aMC_v2_7_3/pp2wz_decay_test/run_01_tag_1_debug.log'.
Please attach this file to your report.

Is there are way out to decay the W and the Z-bosons while keeping the NP^2=1 on?

Many thanks.



Question information

English Edit question
MadGraph5_aMC@NLO Edit question
No assignee Edit question
Last query:
Last reply:
Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said :

No I do not have a way out.


Can you help with this problem?

Provide an answer of your own, or ask Shankha Banerjee for more information if necessary.

To post a message you must log in.