Problems with decay with squared ordered constraints

Asked by Shankha Banerjee on 2021-02-17

Hi,

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 https://bugs.launchpad.net/mg5amcnlo
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.

Cheers,

Shankha.

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
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Last query:
2021-02-17
Last reply:
2021-02-17

No I do not have a way out.

Olivier

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