How madgraph deal with Higgs decay?

Asked by Winston on 2020-09-06

Hi experts,
      I simulated a process with Higgs boson in final state , and the decay mode of Higgs boson is not assigned. After pythia8 and Delphes simulation, I obtained a root file with leptons, jets, and photons. How madgraph deal with Higgs boson decay? Does it assume an inclusive decay modes? What's more, If I don't assign the decay modes of top quark, does it include all it's decay modes?

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2020-09-06
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2020-09-06

Hi,

Such decay are done by Pythia8 by default and indeed the default mode is to follow the branching ration.
Obviously such decay in Pythia8 do not have spin-correlation (like you would from MG5aMC or MadSpin).

If you want to restrict the decay mode and/or forbif Pythia8 to decay such particle, I would invite you to read the pythia8 manual.

Cheers,

Olivier

> On 6 Sep 2020, at 10:30, Winston <email address hidden> wrote:
>
> New question #692776 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/692776
>
> Hi experts,
> I simulated a process with Higgs boson in final state , and the decay mode of Higgs boson is not assigned. After pythia8 and Delphes simulation, I obtained a root file with leptons, jets, and photons. How madgraph deal with Higgs boson decay? Does it assume an inclusive decay modes? What's more, If I don't assign the decay modes of top quark, does it include all it's decay modes?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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