Open heavy flavor production in pPb and PbPb collisions at LHCb

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 provides valuable information on charm hadronisation mechanisms, testing the role of coalescence in the Quark-Gluon Plasma created in PbPb collisions. In pPb 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. Here, we present precision measurements of open charm production from a set of charmed hadrons in pPb collisions at 5.02 and 8.16 TeV, including the first measurement of Ξ⁺c baryons in heavy ion collisions. The nuclear modification factor RpPb, forward-backward ratio RFB and particle production ratios of charm baryons and mesons are discussed and compared to models.