MadGraph5_aMC@NLO

Loop induced process

Asked by laura duarte

Dear mg5aMC authors,

I am currently trying to generate the process a a > z a, z > e+ e- [noborn=QED].

Firstly, I'm not sure if I can include z(or any) decay for loop processes. It is possible with MG5?
When I try to generate events with this syntax I get the following error "InvalidCmd : No particle a, in model", which clearly doesn't make sense.

Does MG5 compute loops with decay chain?

Many thanks

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

You are correct, we can not do decay chain for loop computation.

Cheers,

Olivier

> On 5 Jun 2024, at 21:10, laura duarte <email address hidden> wrote:
>
> New question #816177 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/816177
>
> Dear mg5aMC authors,
>
> I am currently trying to generate the process a a > z a, z > e+ e- [noborn=QED].
>
> Firstly, I'm not sure if I can include z(or any) decay for loop processes. It is possible with MG5?
> When I try to generate events with this syntax I get the following error "InvalidCmd : No particle a, in model", which clearly doesn't make sense.
>
> Does MG5 compute loops with decay chain?
>
> Many thanks
>
>
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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