MadGraph5_aMC@NLO

gg → H → hh → γγγγ

Asked by Ayoub Hmissou

how to generate the process gg → H → hh → γγγγ

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

I do not know, this depend of the model and what is possible to do within your model.

maybe this syntax can work (depending of the model and of the spectrum)
generate g g > H , H > h h , h > a a

But if any of those are loop-induced decay then you would have issue. (and need a model that support loop computation --or that contracted the loop assuming some limit--)

Cheers,

Olivier

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Ayoub Hmissou (ayb+) said : 		#2

in the 2HDM can work this

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Olivier Mattelaer (olivier-mattelaer) said : 		#3

If you have a
ggH interaction within that model (at tree level)
and that model include also "haa" (a is photon) as a tree level interaction, then it should work.

If your model only has haa but is able to compute loop you can do

generate g g > h [QCD]
output
launch
madspin=none
decay H > h h , h > a a

Cheers,

Olivier

> On 12 Aug 2023, at 01:00, Ayoub Hmissou <email address hidden> wrote:
>
> Question #707603 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/707603
>
> Status: Answered => Open
>
> Ayoub Hmissou is still having a problem:
> in the 2HDM can work this
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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