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dc.contributor.authorAyben, Karasu Uysal
dc.contributor.authorALICE, Collaboration
dc.date.accessioned2019-07-03T12:14:48Z
dc.date.available2019-07-03T12:14:48Z
dc.date.issued2019
dc.identifier.urihttps://hdl.handle.net/20.500.12498/360
dc.description.abstractA measurement of the production of prompt Λ+c baryons in Pb-Pb collisions at sNN−−−√=5.02 TeV with the ALICE detector at the LHC is reported. The Λ+c and Λ¯¯¯¯−c were reconstructed at midrapidity (|y|< 0.5) via the hadronic decay channel Λ+c→pK0S (and charge conjugate) in the transverse momentum and centrality intervals 6< pT< 12 GeV/c and 0-80%. The Λ+c/D0 ratio, which is sensitive to the charm quark hadronisation mechanisms in the medium, is measured and found to be larger than the ratio measured in minimum-bias pp collisions at s√=7 TeV and in p-Pb collisions at sNN−−−√=5.02 TeV. In particular, the values in p-Pb and Pb-Pb collisions differ by about two standard deviations of the combined statistical and systematic uncertainties in the common pT interval covered by the measurements in the two collision system. The Λ+c/D0 ratio is also compared with model calculations including different implementations of charm quark hadronisation. The measured ratio is reproduced by models implementing a pure coalescence scenario, while adding a fragmentation contribution leads to an underestimation. The Λ+c nuclear modification factor, RAA, is also presented. The measured values of the RAA of Λ+c, Ds and non-strange D mesons are compatible within the combined statistical and systematic uncertainties. They show, however, a hint of a hierarchy (RD0AA< RDsAA< RΛ+cAA), conceivable with a contribution of recombination mechanisms to charm hadron formation in the medium.en_US
dc.relationhttps://doi.org/10.1016/j.physletb.2019.04.046en_US
dc.subjectALICE Experiment, LHC, Charm Quarken_US
dc.titleΛ+c production in Pb-Pb collisions at √sNN=5.02 TeVen_US
dc.typeArticleen_US
eperson.orcidid0000-0001-6297-2532en_US


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