MadGraph5_aMC@NLO

one-loop Higgs process with on shell decay

Asked by lily

Hi,

The version of Mg5-2.3.0 can be used to simulate g g > h01 h2 in MSSM. However, how to make the h01 and h2 continue to on-shell decay? namely generate g g > h01 h2, (h01 > b b~), (h2 > b b~) directly using madgraph5?

I try the following the input, but it is wrong.
MG5_aMC>import model loop_MSSM
MG5_aMC>generate g g > h01 h2 [QCD], (h01 > b b~), (h2 > b b~)
Command "generate g g > h01 h2 [QCD], (h01 >b b~), (h2 > b b~)" interrupted with error:
InvalidCmd : ML5 cannot yet decay a core process including loop corrections.

Many thanks,

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

This can not be handle at that level.
Such decay need to be done in a second step.

Either with MadSpin (with mode spincorrelation=none as explained within the appendix of the paper: 1507.00020)
or similarly within the parton-shower program.

Cheers,

Olivier

On 18 Jul 2015, at 10:51, lily <email address hidden> wrote:

> New question #269378 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/269378
>
> Hi,
>
> The version of Mg5-2.3.0 can be used to simulate g g > h01 h2 in MSSM. However, how to make the h01 and h2 continue to on-shell decay? namely generate g g > h01 h2, (h01 > b b~), (h2 > b b~) directly using madgraph5?
>
> I try the following the input, but it is wrong.
> MG5_aMC>import model loop_MSSM
> MG5_aMC>generate g g > h01 h2 [QCD], (h01 > b b~), (h2 > b b~)
> Command "generate g g > h01 h2 [QCD], (h01 >b b~), (h2 > b b~)" interrupted with error:
> InvalidCmd : ML5 cannot yet decay a core process including loop corrections.
>
> Many thanks,
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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