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Measurement of the production cross section of prompt Ξc0 baryons at midrapidity in pp collisions at √s = 5.02 TeV

The transverse momentum (pT) differential cross- section of the charm-strange baryon Ξc^0 is measured at midrapidity (|y| < 0.5) via its semileptonic decay into e^+Ξ^−ν_e in pp collisions at √s = 5.02 TeV with the ALICE detector at the LHC. The ratio of the pT-differential Ξc^0-baryon and D^0-meson production cross-sections is also reported. The measurements are compared with simulations with different tunes of the PYTHIA 8 event generator, with predictions from a statistical hadronisation model (SHM) with a largely augmented set of charm-baryon states beyond the current lists of the Particle Data Group, and with models including hadronisation via quark coalescence. The pT-integrated cross section of prompt Ξc^0-baryon production at midrapidity is also reported, which is used to calculate the baryon-to-meson ratio Ξc^0/D^0 = 0.20 ± 0.04(stat.)−0.07+0.08(syst.). These results provide an additional indication of a modification of the charm fragmentation from e^+e^− and e^−p collisions to pp collisions.

Heavy Ion Experiments ; Xi: direct production ; hadronization: statistical ; p p: scattering ; charm: fragmentation ; quark: coalescence ; hadronization: model ; Monte Carlo ; semileptonic decay ; ALICE ; transverse momentum ; CERN LHC Coll ; PYTHIA ; differential cross section ; experimental results ; 5020 GeV-cms/nucleon

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