Measurement of Prompt D0, Λc+, and Σc0,++(2455) Production in Proton-Proton Collisions at √s = 13 TeV
ALICE Collaboration. (2022). Measurement of Prompt D0, Λc+, and Σc0,++(2455) Production in Proton-Proton Collisions at √s = 13 TeV. Physical Review Letters, 128(1), Article 012001. https://doi.org/10.1103/PhysRevLett.128.012001
Published inPhysical Review Letters
© 2022 CERN, for the ALICE Collaboration
The pT-differential production cross sections of prompt D0, Λ+c, and Σ0,++c(2455) charmed hadrons are measured at midrapidity (|y|<0.5) in pp collisions at √s = 13 TeV. This is the first measurement of Σ0,++c production in hadronic collisions. Assuming the same production yield for the three Σ0,+,++c isospin states, the baryon-to-meson cross section ratios Σ0,+,++c/D0 and Λ+c/D0 are calculated in the transverse momentum (pT) intervals 2<12 and 1<24 GeV/c. Values significantly larger than in e+e− collisions are observed, indicating for the first time that baryon enhancement in hadronic collisions also extends to the Σc. The feed-down contribution to Λ+c production from Σ0,+,++c is also reported and is found to be larger than in e+e− collisions. The data are compared with predictions from event generators and other phenomenological models, providing a sensitive test of the different charm-hadronization mechanisms implemented in the models.
PublisherAmerican Physical Society
ISSN Search the Publication Forum0031-9007
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