Left and Right polarizations

The use of "L" is forbidden to avoid that user uses it thinking that it can means what it is not.
"L" could have mean longitudinal (and actually it was in the first alpha implementation).

You can use "+" and "-" syntax instead. (please check the paper to double check the allowed syntax for that case).

Cheers,

Olivier

> On 14 Nov 2023, at 00:25, Alan Hernández <email address hidden> wrote:
>
> New question #708441 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/708441
>
> Dear Madgraph experts,
>
> I'm trying to study the left and right polarizations in the H->ZZ->4leptons state, where the Higgs mass is for example mH= 200 GeV, and therefore both Z bosons are on-shell. So I write
>
> generate H > Z{L} Z{L}, Z > e+ e-, Z > mu+ mu-
>
> but I obtain the following error:
>
> InvalidCmd: Left polarization not handle for decay particle for spin (2s+1=3) particles.
>
> If I use the 0 polarization instead of L or R I have no problems. My question is: Is there a way to decay Left(Right) polarized bosons?
>
> Best,
>
> Alan
>
>
>
>
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