Longitudinally polarised vector bosons

Not sure to understand your question.
MG5aMC does not handle hadron so if you want to decay directly the Z to hadron then MG5aMC can not do it.
What we can do is to the decay the Z into two high energy quark and then you can pass our output to a parton shower program which will handle the QCD radiation from those quark and then the hadronization of those radiation.

For the syntax for polarization state need to be specified in the production not in the decay:
generate p p > z{0} z{0}, z > j j

Cheers,

Olivier

> On 10 May 2024, at 15:45, Tisa Biswas <email address hidden> wrote:
>
> New question #812894 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/812894
>
> Hi,
>
> I am attempting to study a process that involves a new interaction between the quarks and the goldstone bosons. I am interested in applications of the Goldstone boson equivalence theorem, which states that at high enough energies (E_W>>M_W) the probability of emission of a longitudinally polarised vector boson becomes equivalent to that of a Goldstone boson.
>
> for eg. suppose we consider generating a process :
>
> generate p p > g0 g0 NP=1, g{0} > j j, g{0} > j j
>
> I intend to produce Z_L Z_L and decay them hadronically. I am not able to understand how I should implement it in MG5, particularly with regard to the decays of the vector bosons? Is the above syntax appropriate for the production of two Z_L's that decay hadronically? Please suggest.
>
> Thanks for any help you can provide,
>
> Tisa
>
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