MadGraph5_aMC@NLO

Madspin for SMEFT decomposition

Asked by Alexander Ba

Dear Madgraph team,

Unfortunately, it is not possible to use Madspin together with the SMEFT decomposition into linear and squared contributions. Thus we decay our top quarks with Pythia instead of Madspin.

At NLO, it seems clear that we will lose the ttbar spin correlations. Is this also the case at LO?

Thank you very much in advance!

Cheers,
Alexander

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Solved by:
Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

yes indeed.

Cheers,

Olivier

> On 4 Sep 2020, at 19:45, Alexander Ba <email address hidden> wrote:
>
> New question #692751 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/692751
>
> Dear Madgraph team,
>
> Unfortunately, it is not possible to use Madspin together with the SMEFT decomposition into linear and squared contributions. Thus we decay our top quarks with Pythia instead of Madspin.
>
> At NLO, it seems clear that we will lose the ttbar spin correlations. Is this also the case at LO?
>
>
> Thank you very much in advance!
>
> Cheers,
> Alexander
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Alexander Ba (aboson) said : 		#2

Thanks Olivier Mattelaer, that solved my question.