Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √s=13 TeV



Acharya, S, Adamova, D, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I, Akindinov, A
et al (show 1044 more authors) (2023) Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √s=13 TeV PHYSICAL REVIEW D, 108 (11). 112003-. ISSN 2470-0010, 2470-0029

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Abstract

The production cross sections of D0 and Λc+ 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 bb¯ production cross section per unit of rapidity at midrapidity, estimated from these measurements, is dσbb¯/dy||y|<0.5=83.1±3.5(stat)±5.4(syst)-3.2+12.3(extrap) μb. The baryon-to-meson ratios are computed to investigate the hadronization mechanism of beauty quarks. The nonprompt Λc+/D0 production ratio has a similar trend to the one measured for the promptly produced charmed particles and to the p/π+ and Λ/KS0 ratios, suggesting a similar baryon-formation mechanism among light, strange, charm, and beauty hadrons. The pT -integrated nonprompt Λc+/D0 ratio is found to be significantly higher than the one measured in e+e- collisions.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 14 Aug 2024 14:27
Last Modified: 23 May 2026 08:18
DOI: 10.1103/PhysRevD.108.112003
Open Access URL: https://doi.org/10.1103/PhysRevD.108.112003
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3183734
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