Can we have off shell particles in the final state?

Hi,

> Is there a way to require that the higgs be on-shell, and one of final state z's to be off-shell?

No all final state particules are forced to be onshell (they should be in assomptatic state for the S-matrix computation)

What i would suggest is to do
generate p p > z h , h > z e+ e-

> Also, just to confirm, would some thing like "p p > h > z z z" always
> forces higgs to be off-shell?

The syntax does not force off-shell contribution, but since the higgs mass is smaller than twice the Z mass, it would automatically be the case.

Cheers,

Olivier

> On 9 Mar 2019, at 03:17, Prudhvi Nikhil Bhattiprolu <email address hidden> wrote:
>
> New question #679062 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/679062
>
> Dear Madgraph experts,
>
> I want to generate p p > h z, (h > z z), which obviously doesn't work. So, to get this process to work, previously I was doing "generate p p > h > z z z", but this forces the higgs to be off-shell. Is there a way to require that the higgs be on-shell, and one of final state z's to be off-shell? Any help would be much appreciated!
>
> Thanks
>
> Cheers,
> Prudhvi
>
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