Simultaneous fit of the dielectron invariant mass and pseudo-proper decay length two-dimensional distribution in the $8 < p_{\rm T}^{\rm J/\psi} < 15$ GeV/c interval. Left: projection on the invariant mass axis. Right: Projection on the pseudo-proper decay length axis. The various components of the fit are also shown. The vertical black line at $x\approx$100 ${\mu}$m shows the lower cut value selecting a non-prompt J/$\psi$ sample with less than 10% contamination from prompt J/$\psi$.