Prompt D0, D+, and D*+ production in Pb-Pb collisions at √SNN=5.02 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU
et al (show 995 more authors) (2022) Prompt D0, D+, and D*+ production in Pb-Pb collisions at √SNN=5.02 TeV JOURNAL OF HIGH ENERGY PHYSICS, 2022 (1). 174-. ISSN 1126-6708, 1029-8479

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Abstract

The production of prompt D<sup>0</sup>, D<sup>+</sup>, and D<sup>*+</sup> mesons was measured at midrapidity (|y| < 0.5) in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair sNN = 5.02 TeV with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decay channels and their production yields were measured in central (0–10%) and semicentral (30–50%) collisions. The measurement was performed up to a transverse momentum (p<inf>T</inf>) of 36 or 50 GeV/c depending on the D meson species and the centrality interval. For the first time in Pb–Pb collisions at the LHC, the yield of D<sup>0</sup> mesons was measured down to p<inf>T</inf> = 0, which allowed a model-independent determination of the p<inf>T</inf>-integrated yield per unit of rapidity (dN/dy). A maximum suppression by a factor 5 and 2.5 was observed with the nuclear modification factor (R<inf>AA</inf>) of prompt D mesons at p<inf>T</inf> = 6–8 GeV/c for the 0–10% and 30–50% centrality classes, respectively. The D-meson RAA is compared with that of charged pions, charged hadrons, and J/ψ mesons as well as with theoretical predictions. The analysis of the agreement between the measured R<inf>AA</inf>, elliptic (v<inf>2</inf>) and triangular (v<inf>3</inf>) flow, and the model predictions allowed us to constrain the charm spatial diffusion coefficient D<inf>s</inf>. Furthermore the comparison of R<inf>AA</inf> and v<inf>2</inf> with different implementations of the same models provides an important insight into the role of radiative energy loss as well as charm quark recombination in the hadronisation mechanisms. [Figure not available: see fulltext.]

Item Type: Article
Uncontrolled Keywords: Lepton-Nucleon Scattering (experiments)
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 17 May 2022 15:47
Last Modified: 16 Jun 2026 14:10
DOI: 10.1007/JHEP01(2022)174
Open Access URL: https://link.springer.com/article/10.1007/JHEP01(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3154968
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