Sprecher
Beschreibung
Heavy quarks are produced in the early stage of heavy ion collisions due to their large mass, and experience the entire evolution of the QCD medium. The baryon-to-meson ratio, in particular, the $\Lambda_c^+$/$D^0$ ratio, provides valuable information on charm hadronization mechanisms, testing the role of coalescence in the Quark-Gluon Plasma created in PbPb collisions. In $p$Pb collisions, heavy quarks are essential to study cold nuclear matter effects, which include the modification of nuclear parton distribution functions, energy loss in the nucleus, and other effects, providing a crucial baseline for interpreting PbPb measurements. In this talk, the first LHCb open charm measurement in PbPb collisions, the $\Lambda_c^+$/$D^0$ ratio, will be presented. Moreover, this presentation will show precision measurements of open charm production from a rich set of charmed hadrons in $p$Pb collisions at 5.02 and 8.16 TeV, including the first measurement of $\Xi_c^+$ baryons in heavy ion collisions. The nuclear modification factor $R_{p\mathrm{Pb}}$, forward-backward ratio $R_{\mathrm{FB}}$ and particle production ratios of charm baryons and mesons will be discussed and compared to models.
Affiliation
On behalf of LHCb
| Experiment/Theory | LHCb |
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