Higgs -> b b branch tation

Hi,

Did you look at the following FAQ: https://answers.launchpad.net/madgraph5/+faq/2442?

Cheers,

Olivier
On Dec 10, 2013, at 6:16 PM, Huanian Zhang <email address hidden> wrote:

> New question #240586 on MadGraph5:
> https://answers.launchpad.net/madgraph5/+question/240586
>
> Hi Professor,
>
> I have one question about the Higgs decay. I work in mssm frame. Below is my process:
>
> generate p p > t1 t1~, (t1~ > x1- b~, (x1- > n1 w-, w- > j j)), (t1 > n2 t, (n2 > n1 h1, h1 > b b~), (t > b w+, w+ > l+ vl))
> add process p p > t1 t1~, (t1~ > x1- b~, (x1- > n1 w-, w- > l- vl~)), (t1 > n2 t, (n2 > n1 h1, h1 > b b~), (t > b w+, w+ > j j))
> add process p p > t1 t1~, (t1 > x1+ b, (x1+ > n1 w+, w+ > l+ vl)), (t1~ > n2 t~, (n2 > n1 h1, h1 > b b~), (t~ > b~ w-, w- > j j))
> add process p p > t1 t1~, (t1 > x1+ b, (x1+ > n1 w+, w+ > j j)), (t1~ > n2 t~, (n2 > n1 h1, h1 > b b~), (t~ > b~ w-, w- > l- vl~))
>
> For a stop of mass 413.6 GeV, my calculation of the cross section for the above process is 4 * 14.589 = 58.356 fb, while the Madgraph gives 29.00 fb (parton level).
>
> And I check every sigle step and find the problem is the Higgs decay. The higgs decay will give a factor of 2. Why the higgs decay will introduce such a discrepancy?
>
> Thank you very much and have a good day.
>
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