Speaker
Description
One of the present challenges for the theoretical understanding of heavy-quark hadronization is
represented by the description of the measurements of heavy baryon production in AA, pA and pp collisions.
The coalescence hadronization approaches have predicted an unexpected large Λc/D0 ratio is of O(1) in AA collisions,
that has been first observed at RHIC energies and recently in pp, pA and AA collisions at LHC.
The large ratio observed in small collision systems appears to be a strong violation of the universality of the
fragmentation function seen in elementary collision systems, where the observed Λc/D0 is of O(10−1).
Within a relativistic Boltzmann transport approach coupled to an hadronisation mechanism based on the
coalescence and fragmentation processes we will show the results obtained in AA collisions for D0, Ds, Λc spectra
and the related baryon to meson ratios at RHIC and LHC. Furthermore, we will present results obtained extending
this analysis to smaller systems like in pp collisions at top LHC energies for the heavy baryon/meson ratio and
the pT spectra of charmed hadrons with and without strangeness content: D0, Ds, Λc , Σc and the recently
measured Ξc baryon, finding an enhancement in comparison with the ratio observed for e +e −, ep collisions;
we will show prediction of a significant production of Ωc respect to D0. Finally, we discuss the particle
yields of multi-charmed baryons focusing mainly on the production of Ξcc and Ωccc. We will provide first
predictions for charmed and multi-charmed hadrons in PbPb collision in 0−10% centrality class and then
we explore the system size dependence through KrKr , ArAr and OO collisions, planned within the ALICE3 experiment.
[1 ]V.Minissale, S.Plumari, Y.Sun and V.Greco, arXiv:2305.03687 [hep-ph].
[2] V. Minissale, S. Plumari and V. Greco, Physics Letters B 821 (2021) 136622.
[3] S. Plumari, V. Minissale, S.K. Das, G. Coci and V. Greco, Eur.Phys.J. C 78 (2018) no.4, 348
