Semi-leptonic final state of 4top production

Hi,

You can do this (since 2.7.0):

generate p p > 2t 2t~, t > b l vl~, t > b j j, t~ > b~ j j

Cheers,

Olivier

> On 7 Mar 2020, at 12:33, Tobias Theil <email address hidden> wrote:
>
> New question #689189 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/689189
>
> Hi,
>
> I want to perform a collider study concerning 4top production at the FCC to constrain some BSM models.
>
> In order to not having to deal with the large backgrounds I am planning to look into semi-leptonic final states, same-sign dileptons or even trileptons. So my question is if there is a way to use the Madgraph decay syntax to generate only semi-leptonic decays or do I have to generate the full decay of the top quarks and pick out the final states I want?
>
> In other words, is it possible to have the process p p > t t t~ t~ and tell Madgraph to e.g. decay one of the tops leptonically and the other hadronically (while decaying both t~ hadronically)?
>
> Many thanks in advance,
> Tobias
>
> --
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> contact for MadGraph5_aMC@NLO.

Thanks Olivier Mattelaer, that solved my question.

Hi,

I am reopening this question because I noticed that using the syntax you suggested does also generate fully hadronic decays as well as fully leptonic decays of the top quark, not just the mixed one.

Again, thanks in advance,

Tobias

Yes, this syntax indeed only generates the mixed decays!

Thanks Olivier Mattelaer, that solved my question.