A1 Journal article (refereed)
Measurement of beauty-strange meson production in Pb–Pb collisions at √sNN = 5.02 TeV via non-prompt Ds+ mesons (2023)

ALICE Collaboration. (2023). Measurement of beauty-strange meson production in Pb–Pb collisions at √sNN = 5.02 TeV via non-prompt Ds+ mesons. Physics Letters B, 846, Article 137561. https://doi.org/10.1016/j.physletb.2022.137561

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2023

Publication date: 19/09/2023

Volume: 846

Article number: 137561

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2022.137561

Research data link: https://www.hepdata.net/record/ins2071181

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/90770

Publication is parallel published: https://arxiv.org/abs/2204.10386

Abstract

The production yields of non-prompt D+ s mesons, namely D+ s mesons from beauty-hadron decays, were measured for the first time as a function of the transverse momentum (pT) at midrapidity (|y| < 0.5) in central and semi-central Pb–Pb collisions at a centre-of-mass energy per nucleon pair √sNN = 5.02 TeV with the ALICE experiment at the LHC. The D+ s mesons and their charge conjugates were reconstructed from the hadronic decay channel D+ s → φπ+, with φ → K−K+, in the 4 < pT < 36 GeV/c and 2 < pT < 24 GeV/c intervals for the 0–10% and 30–50% centrality classes, respectively. The measured yields of non-prompt D+ s mesons are compared to those of prompt D+ s and non-prompt D0 mesons by calculating the ratios of the production yields in Pb–Pb collisions and the nuclear modification factor RAA. The ratio between the RAA of non-prompt D+ s and prompt D+ s mesons, and that between the RAA of non-prompt D+ s and non-prompt D0 mesons in central Pb–Pb collisions are found to be on average higher than unity in the 4 < pT < 12 GeV/c interval with a statistical significance of about 1.6 σ and 1.7 σ, respectively. The measured RAA ratios are compared with the predictions of theoretical models of heavy-quark transport in a hydrodynamically expanding QGP that incorporate hadronisation via quark recombination.

Keywords: nuclear physics

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Ministry reporting: Yes

Reporting Year: 2023

JUFO rating: 3