Very different cross sections for g g > w+ w- s s~ and g g > w+ w- b b~ with 5FS

Asked by Nick on 2020-06-01

Dear MG5 Team,

I'm generating the following processes, and I'm getting very different cross-sections:

g g > w+ w- s s~
xsec: 0.185 pb

g g > w+ w- b b~
xsec: 405.9 pb

I'm using MG 2.7.2, and in both cases I'm setting:
set maxjetflavor 5
set param_card mb 0
set param_card ymb 0
set cut_decays True

I'm wondering why such a big difference.

Thanks very much!
Nick

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Solved by:
Olivier Mattelaer
Solved:
2020-06-02
Last query:
2020-06-02
Last reply:
2020-06-02

This is top pair production no?

Cheers,

Olivier

> On 2 Jun 2020, at 01:20, Nick <email address hidden> wrote:
>
> New question #691080 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/691080
>
> Dear MG5 Team,
>
> I'm generating the following processes, and I'm getting very different cross-sections:
>
> g g > w+ w- s s~
> xsec: 0.185 pb
>
> g g > w+ w- b b~
> xsec: 405.9 pb
>
> I'm using MG 2.7.2, and in both cases I'm setting:
> set maxjetflavor 5
> set param_card mb 0
> set param_card ymb 0
> set cut_decays True
>
> I'm wondering why such a big difference.
>
> Thanks very much!
> Nick
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Nick (nick1) said : #2

Thanks Olivier Mattelaer, that solved my question.