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The recent experimental measurements on $pp$ collisions at $\sqrt{s}=5.02\,\rm TeV$ have shown a very large abundance of heavy baryon productioncorresponding to a ratio of $\Lambda_c/D^0 \sim 0.6$, about one order ofmagnitude larger than what measured in $e^+e^-$, $ep$ collisions and even in$pp$ collisions at LHC, but at forward rapidity. We apply for the first time to$pp$ collisions a quark coalescence plus fragmentation approach developed for$AA$ collisions, assuming the formation of Hot QCD matter at finitetemperature. An approach that has correctly predicted a $\Lambda_c/D \sim O(1)$in AA collisions at RHIC energy. We calculate the heavy baryon/meson ratio andthe $p_T$ spectra of charmed hadrons with and without strangeness content:$D^{0}$, $D_{s}$, $\Lambda_{c}^{+}$, $\Xi_c$ and $\Omega_c$ in $pp$ collisionsat top LHC energies, finding a satisfactory result for the measured$\Lambda_{c}^{+}/D^0$ and the $\Xi_c/D^0$ without any specific tuning ofparameters to $pp$ collisions. At variance with other approaches a coalescenceapproach predicts also a significant production of $\Omega_c$ such that$\Omega_c/D^0 \sim O(10^{-1})$ .

Charm Hadrons in pp collisions at LHC energy within a Coalescence plus Fragmentation approach