MadGraph5_aMC@NLO

madspin two decay paths

Asked by Pim Verschuuren on 2020-06-10

Dear experts,

I have the following process within madgraph:

generate p p > t t~, (t > w+ b, w+ > l+ vl), (t~ > w- b~, w- > j j)
add process p p > t t~, (t > w+ b, w+ > j j), (t~ > w- b~, w- > l- vl~)

Now for several reasons I have to apply the same decay but then with madspin. Is this possible and if so, what is the madspin lines for this? I tried the following but it didn't give the same results as the above:

process_card:
generate p p > t t~

madspin_card:
decay t > w+ b, w+ > j j, t~ > w- b~, w- > l- vl~
decay t > w+ b, w+ > l+ vl, t~ > w- b~, w- > j j

Thanks in advance.

Kind regards,

Pim

Question information

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MadGraph5_aMC@NLO Edit question
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Last query:
2020-06-10
Last reply:
2020-06-10
Olivier Mattelaer (olivier-mattelaer) said : #1

Hi,

No this is not possible with madspin without having two separate generation.

Cheers,

Olivier

> On 10 Jun 2020, at 19:45, Pim Verschuuren <email address hidden> wrote:
>
> New question #691249 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/691249
>
> Dear experts,
>
> I have the following process within madgraph:
>
> generate p p > t t~, (t > w+ b, w+ > l+ vl), (t~ > w- b~, w- > j j)
> add process p p > t t~, (t > w+ b, w+ > j j), (t~ > w- b~, w- > l- vl~)
>
> Now for several reasons I have to apply the same decay but then with madspin. Is this possible and if so, what is the madspin lines for this? I tried the following but it didn't give the same results as the above:
>
> process_card:
> generate p p > t t~
>
>
> madspin_card:
> decay t > w+ b, w+ > j j, t~ > w- b~, w- > l- vl~
> decay t > w+ b, w+ > l+ vl, t~ > w- b~, w- > j j
>
> Thanks in advance.
>
> Kind regards,
>
> Pim
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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