Branching ratio

Hi,

> can a branching ratio be measured in Madgraph?

Let state the obvious first: Madgraph does not do measurement but prediction (within a theoretical framework/hyppothesis/level of precision).
So obviously, I do understand that this is not your real question.

> I expected to get similar results but I got results are different by 1 pb

Well is 1pb is big or small here? I do not know with your information.
Obviously you are using the NWA in one case (relative theoretical error of the order of width/mass)
compare to a full computation. so you do not expect to get the exact same number.

Cheers,

Olivier

> On 28 Jun 2022, at 16:05, Sarah <email address hidden> wrote:
>
> New question #702323 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/702323
>
> Hello
>
> can a branching ratio be measured in Madgraph?
>
> I am asking this question because I calculated the process in 2HDM g g > A > h e+ e- /a [QCD] ( e+ e- come from z) and I calculated the process in 2HDM g g > A [QCD] then multipled the cross section (gg>A) by BR(A>hz) from 2HDMC and multipled it by 0.03 (the branching ratio of z goes to e+ e-).
>
> I expected to get similar results but I got results are different by 1 pb
>
> I am trying to find an answer to the puzzle.
>
> best regards
>
>
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