Abstract
In a coalescence plus fragmentation approach we study the pT spectra of charmed hadrons D0, Ds up to about 10 GeV and the Λ+c /D0 ratio from RHIC to LHC energies. In this study we have included the contribution from decays of heavy hadron resonances and also that due to fragmentation of heavy quarks that are left in the system after coalescence. The pT dependence of the heavy baryon/meson ratios is found to be sensitive to the heavy quark mass. In particular we found that the Λc/D0 is much flatter than the one for light baryon/meson ratio like p/π and Λ/K.
Highlights
Ultra-relativistic Heavy Ion Collisions can be used to probe the properties of the Quark-Gluon Plasma (QGP)
The study of heavy baryons like D mesons or Λc baryons and the systematic study of the baryon over meson ratio for different species from light to heavy flavor are important in order to understand the hadronization mechanism
The results obtained for the spectra are in good agreement with the recent experimental data from RHIC to LHC in central collisions.We have studied the pT dependence of the Λc/D0 ratio for different energies
Summary
Ultra-relativistic Heavy Ion Collisions (uHIC) can be used to probe the properties of the Quark-Gluon Plasma (QGP). For light and strange hadrons it has been shown an enhancement of the baryon over meson ratio compared to the one for p-p collision. Recent experimental results from STAR collaboration have shown that similar enhancement of the baryon/meson ratio is expected in the heavy flavor sector [1]. Hadronization via coalescence lead to a modification of the relative abundance of the different heavy hadron species produced. In particular this can manifests in a baryon-to-meson enhancement for charmed hadrons. The ΛC/D0 enhancement due to coalescence was first suggested in [2] where based on di-quark or three-quark coalescence mechanism with a full thermalized charm quarks and the predicted Λc/D0 ratio is found to be comparable to the recent experimental data. Other recent calculations on the Λc/D0 can be found in [3, 4]
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