Use spin approximation for decay of particles

Hi,

I would like to quantify the difference between the decay of bosons using the full spin correlation vs. an approximation which only takes the diagonal elements of the spin density matrix into account, latter being an approximation I rely on in a special use case.

Is it possible to use this approximation as a flag in MadSpin or is there any other possibility for this?

If not even samples using a isotropic decay would be helpful.

Thanks,
Carsten