MadGraph5_aMC@NLO

can not generate w+ > c b~

Asked by Wei Wei

I wanted to calculate the decay of w+ > c b~ and w- > c~ b in SM, but I got:

Command "generate w+ > c b~" interrupted with error:
NoDiagramException : No amplitudes generated from process Process: w+ > c b~ @1. Please enter a valid process

That's weird to me because this process is allowed in standard model.
Is there a reason for that?

Thanks.
Wei

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

For optimization of our code, we have the default model without any off diagonal interaction.
Those are in general not relevant for pheno at LHC.

In your case you need to lead a more generic model that you can do with the command:
import model sm-ckm

Cheers,

Olivier

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