Heavy Quark Baryon and Meson Production in pp and AA at RHIC and LHC Within a Coalescence Plus Fragmentation Model

The hadronization process of heavy hadrons with bottom and charm quarks, especially for baryons \(\varLambda _c\), in a dense QGP medium is largely not understood. We present predictions obtained with a coalescence plus fragmentation model, for \(D^0\), \(D_s\), \(\varLambda _c\) spectra, the related baryon to meson ratios and the \(D_s/D^0\) ratio, both at RHIC and LHC energies in a wide range of transverse momentum. We discuss how our model can naturally predict values of the order of O(1) for \(\varLambda _c/D^0\) as recently measured at both RHIC and LHC. Moreover assuming that at the LHC top energies there can be the formation of QGP, we show that in the same scheme due to considerable volume effect a still large \(\varLambda _c/D^0 \approx 0.5\) is predicted as seen by ALICE in pp collisions.