different decay modes for top pair in MadSpin

hi,

You can actually define multiple decay by having multiple line for the decay t
for example
decay t > w+ b, w+ > l+ vl
decay t > w+ b, w+ > j j

Now if you do this for both t and t~, this will also produce the fully hadronic decay so that one requires a bit of handling outside of our code.

Cheers,

Olivier

> On Dec 22, 2016, at 12:03, mazuza <email address hidden> wrote:
>
> New question #408071 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/408071
>
> Hello,
>
> First, my question was answered here, however its a bit old, I would like to make sure that its still not possible?
> https://answers.launchpad.net/mg5amcnlo/+question/237087
>
> I would like to have pp > t t~ a, where tt~ pair decays only leptonically or semi-leptonically so what I need is a sample containing the following decay modes:
> t > w b, w > l vl, t~ > w b, w > l vl
> or t > w b, w > q q' , t~ w b , w > l vl
> or t > w b > w > l vl , t~ > w b, w > q q'
>
> Is it possible, and how if so?
>
> It looks like I can only specify one decay mode in MadSpin, e.g:
> decay t > w+ b, w+ > l+ vl
> decay t~ > w- b~, w- > l- vl~
>
> Thanks,
> Mazuza
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Hi Olivier,

Thanks for the reply! If I understood correctly I can't produce only dilepton and semilepton ttbar, a so called non all hadronic, using MadSpin.
There is no way to tell MadSpin if one w decays leptonically then other should decay hadronically and vice versa ..or both leptonically at the same time!

Cheers,
Mazuza

Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: Olivier Mattelaer <email address hidden>
Date: 12/22/16 3:23 PM (GMT+01:00)
To: Mazuza Mohammad A Ghneimat <email address hidden>
Subject: Re: [Question #408071]: different decay modes for top pair in MadSpin

Your question #408071 on MadGraph5_aMC@NLO changed:
https://answers.launchpad.net/mg5amcnlo/+question/408071

    Status: Open => Answered

Olivier Mattelaer proposed the following answer:
hi,

You can actually define multiple decay by having multiple line for the decay t
for example
decay t > w+ b, w+ > l+ vl
decay t > w+ b, w+ > j j

Now if you do this for both t and t~, this will also produce the fully
hadronic decay so that one requires a bit of handling outside of our
code.

Cheers,

Olivier

> On Dec 22, 2016, at 12:03, mazuza <email address hidden> wrote:
>
> New question #408071 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/408071
>
> Hello,
>
> First, my question was answered here, however its a bit old, I would like to make sure that its still not possible?
> https://answers.launchpad.net/mg5amcnlo/+question/237087
>
> I would like to have pp > t t~ a, where tt~ pair decays only leptonically or semi-leptonically so what I need is a sample containing the following decay modes:
> t > w b, w > l vl, t~ > w b, w > l vl
> or t > w b, w > q q' , t~ w b , w > l vl
> or t > w b > w > l vl , t~ > w b, w > q q'
>
> Is it possible, and how if so?
>
> It looks like I can only specify one decay mode in MadSpin, e.g:
> decay t > w+ b, w+ > l+ vl
> decay t~ > w- b~, w- > l- vl~
>
> Thanks,
> Mazuza
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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That's correct.

Cheers,

Olivier