MadGraph5_aMC@NLO

how to chande weak mixing angle in madgraph

Asked by Li Mengran

How can I change weak mixng angle in madgraph? What is the name of the parameter and where it is?

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

The weak coupling is an internal parameter of the model. i.e. this is a parameter which is computed via an analytical formula from the various entry of the model.

If you type
display parameters
you will see all the hierarchy of formula:

So in order to change the weak angle, you have to change one of those parameters:
MZ, aEWM1, Gf

Cheers,

Olivier

PS: One other solution is to go back to the FeynRules model and change the definition of the dependent parameter such that you can choose to have the weak angle defined as an external parameter.

> On Nov 1, 2016, at 08:13, Li Mengran <email address hidden> wrote:
>
> New question #403696 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/403696
>
> How can I change weak mixng angle in madgraph? What is the name of the parameter and where it is?
>
> --
> You received this question notification because you are an answer
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