%0 Chart or Table
%A ALICE Collaboration
%T Measurement of the production cross section of prompt Ξ<sup>0</sup><sub>c</sub> baryons in p−Pb collisions at √{s<sub>NN</sub>} = 5.02 TeV
%M GSI-2026-00075
%D 2024
%Z Journal Article GSI record: GSI-2026-00073
%X CERN-LHC. ALICE. The transverse momentum (p<sub>T</sub>) differential production cross section of the promptly produced charm-strange baryon Ξ<sub>c</sub><sup>0</sup> (and its charge conjugate ―Ξ<sub>c</sub><sup>0</sup>) is measured at midrapidity via its hadronic decay into π<sup>+</sup>Ξ<sup>−</sup> in p−Pb collisions at a centre-of-mass energy per nucleon−nucleon collision √{s<sub>NN</sub>} = 5.02 TeV with the ALICE detector at the LHC. The Ξ<sub>c</sub><sup>0</sup> nuclear modification factor (R<sub>pPb</sub>), calculated from the cross sections in pp and p−Pb collisions, is presented and compared with the R<sub>pPb</sub> of Λ<sub>c</sub><sup>+</sup> baryons. The ratios between the p<sub>T</sub>-differential production cross section of Ξ<sub>c</sub><sup>0</sup> baryons and those of D<sup>0</sup> mesons and Λ<sub>c</sub><sup>+</sup> baryons are also reported and compared with results at forward and backward rapidity from the LHCb Collaboration. The measurements of the production cross section of prompt Ξ<sup>0</sup><sub>c</sub> baryons are compared with a model based on perturbative QCD calculations of charm-quark production cross sections, which includes only cold nuclear matter effects in p−Pb collisions, and underestimates the measurement by a factor of about 50. This discrepancy is reduced when the data is compared with a model that includes string formation beyond leading-colour approximation or in which hadronisation is implemented via quark coalescence. The p<sub>T</sub>-integrated cross section of prompt Ξ<sup>0</sup><sub>c</sub>-baryon production at midrapidity extrapolated down to p<sub>T</sub> = 0 is also reported. These measurements offer insights and constraints for theoretical calculations of the hadronisation process. Additionally, they provide inputs for the calculation of the charm production cross section in p−Pb collisions at midrapidity.
%F PUB:(DE-HGF)32
%9 Dataset
%R 10.17182/HEPDATA.155330.V1
%U https://repository.gsi.de/record/363869