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Article
Report number arXiv:2308.04873 ; CERN-EP-2023-159
Title Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at s = 13 TeV
Author(s) ALICE Collaboration  Show all 1061 authors
Corporate author(s) The ALICE collaboration
Publication 2023-12-01
Imprint 31 Jul 2023
Number of pages 19
Note 26 pages, 6 captioned figures, 2 tables, authors from page 20, published version, figures at http://alice-publications.web.cern.ch/node/9559
Published in: Phys. Rev. D 108 (2023) 112003
DOI 10.1103/PhysRevD.108.112003
Subject category Nuclear Physics - Experiment ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords QCD ; heavy quark production ; particle and resonance production ; experimental results
Abstract The production cross sections of D0 and Λ+c hadrons originating from beauty-hadron decays (i.e. non-prompt) were measured for the first time at midrapidity (|y|<0.5) by the ALICE Collaboration in proton-proton collisions at a center-of-mass energy s=13 TeV. They are described within uncertainties by perturbative QCD calculations employing the fragmentation fractions of beauty quarks to baryons measured at forward rapidity by the LHCb Collaboration. The b¯b production cross section per unit of rapidity at midrapidity, estimated from these measurements, is dσb¯b/dy||y|<0.5=83.1±3.5(stat)±5.4(syst)+12.33.2(extrap)μb. The baryon-to-meson ratios are computed to investigate the hadronization mechanism of beauty quarks. The non-prompt Λ+c/D0 production ratio has a similar trend to the one measured for the promptly produced charmed particles and to the p/π+ and Λ/K0S ratios, suggesting a similar baryon-formation mechanism among light, strange, charm, and beauty hadrons. The pT-integrated non-prompt Λc/D0 ratio is found to be significantly higher than the one measured in e+e collisions.
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Copyright/License Publication: © 2023-2025 CERN (License: CC BY 4.0), sponsored by SCOAP³
Preprint: © 2023-2025 CERN (License: CC-BY-4.0)
Submitted by francesco.prino@cern.ch



 


 Record created 2023-07-31, last modified 2025-01-14


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