Speaker
Description
In heavy-ion collisions, charm hadron production can occur via coalescence, where charm quarks combine with the surrounding light quarks in the QGP. The relative coalescence contribution is expected to be more significant for hadrons with a larger number of constituent quarks. Such an effect will contribute to the modification of the baryon-to-meson ratio in heavy-ion collisions, compared to pp collision. Therefore, measurements of $\Lambda_{c}^{+}$ production in PbPb and pp collisions can provide important input to the understanding of the coalescence mechanism for charm quark. The high luminosity datasets collected by the CMS detector have been used to measure $\Lambda_{c}^{+}$ production via $\Lambda_{c}^{+} \to p^{+} K^{-} \pi^{+}$. Results of the ratios of $\Lambda_{c}^{+}$ over $D^{0}$ yields in pp and PbPb collisions will be shown. The nuclear modification factors of $\Lambda_{c}^{+}$ will also be presented.
