Heavy-flavour hadronization in ultra-relativistic heavy-ion collisions: From AA to pp

. - The Lambda c /D 0 ratio observed in AA collisions at RHIC and LHC energies have a value of the order of the unity. On the other hand, the recent experimental measurements in pp collisions at both root s = 5.02 TeV and root s = 13 TeV have shown ratios for charm baryons/mesons Lambda c /D 0 and Xi c /D 0 larger than those measured and expected in elementary e + e - collisions. We present a hadronization mechanism based on the coalescence and fragmentation processes and we show that this model gives a consistent description of several observables involving heavyflavour hadrons from AA collisions to pp collisions. The results obtained within this approach suggest that a description of charmed hadron production in pp collisions require the assumption of the formation of a hot QCD matter at finite temperature. Finally, extending this approach to study the production of hadrons containing multiple charm quarks, Xi cc , Omega cc and Omega ccc we provide the predictions of multi -charmed hadrons in different collision systems, like Pb+Pb, Kr+Kr, Ar+Ar and O+O.