Left panel: correlation matrix between the generated \Omegac baryon $p_{\rm T}$ and the reconstructed opposite-sign charge pairs, obtained from the simulation based on PYTHIA 8 described in Ref. . Right panel: product of $({\rm A}\times\varepsilon)$ for inclusive $\Omega^0_{\rm c}$ baryons in pp collisions at $\sqrt{s} =$ 13 TeV as a function of $p_{\rm T}$.