A1 Journal article (refereed)
Constraining hadronization mechanisms with Λ+c /D0 production ratios in Pb–Pb collisions at √sNN = 5.02 TeV (2023)

ALICE Collaboration. (2023). Constraining hadronization mechanisms with Λ+c /D0 production ratios in Pb–Pb collisions at √sNN = 5.02 TeV. Physics Letters B, 839, Article 137796. https://doi.org/10.1016/j.physletb.2023.137796

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: 28/02/2023

Volume: 839

Article number: 137796

Publisher: Elsevier BV

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2023.137796

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/86361

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2112.08156#

Abstract

The production of prompt Λ+c baryons at midrapidity (|y| < 0.5) was measured in central (0–10%) and mid-central (30–50%) Pb–Pb collisions at the center-of-mass energy per nucleon–nucleon pair √sNN = 5.02 TeV with the ALICE detector. The results are more precise, more differential in centrality, and reach much lower transverse momentum (pT = 1 GeV/c) with respect to previous measurements performed by the ALICE, STAR, and CMS Collaborations in nucleus–nucleus collisions, allowing for an extrapolation down to pT = 0. The pT-differential Λ+c /D0 ratio is enhanced with respect to the pp measurement for 4 < pT < 8 GeV/c by 3.7 standard deviations (σ ), while the pT-integrated ratios are compatible within 1σ.The observed trend is similar to that observed in the strange sector for the /K0S ratio. Model calculations including coalescence or statistical hadronization for charm-hadron formation are compared with the data.

Keywords: particle physics; nuclear physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2023

Preliminary JUFO rating: 3