A1 Journal article (refereed)
Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √ s = 13 TeV (2023)

ALICE Collaboration. (2023). Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √ s = 13 TeV. Physical Review D, 108(11), Article 112003. https://doi.org/10.1103/PhysRevD.108.112003

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2023

Publication date: 08/12/2023

Volume: 108

Issue number: 11

Article number: 112003

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.108.112003

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/93951

Abstract

The production cross sections of D0 and Λ+c hadrons originating from beauty-hadron decays (i.e., nonprompt) 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)+12.3−3.2(extrap)  μb. The baryon-to-meson ratios are computed to investigate the hadronization mechanism of beauty quarks. The nonprompt 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 nonprompt Λ+c/D0 ratio is found to be significantly higher than the one measured in e+e− collisions.

Keywords: hadrons; particle physics

Free keywords: hadron-hadron interactions; particle production

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Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 2