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Prompt D$^0$, D$^+$, and D$^*+$ production in Pb–Pb collisions at $ \sqrts_\mathrmNN $ = 5.02 TeVстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Malinina L., ALICE C.
- Журнал: Journal of High Energy Physics
- Том: 1
- Год издания: 2022
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 174
- DOI: 10.1007/JHEP01(2022)174
- Аннотация: The production of prompt D0^{0}0, D+^{+}+, and D∗+^{*+}∗+ mesons was measured at midrapidity (|y| < 0.5) in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair sNN \sqrt{s_{\mathrm{NN}}} 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 (pT_{T}T) 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 D0^{0}0 mesons was measured down to pT_{T}T = 0, which allowed a model-independent determination of the pT_{T}T-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 (RAA_{AA}AA) of prompt D mesons at pT_{T}T = 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 RAA_{AA}AA, elliptic (v2_{2}2) and triangular (v3_{3}3) flow, and the model predictions allowed us to constrain the charm spatial diffusion coefficient Ds_{s}s. Furthermore the comparison of RAA_{AA}AA and v2_{2}2 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.[graphic not available: see fulltext]
- Добавил в систему: Малинина Людмила Владимировна