## Prompt D$^0$, D$^+$, and D$^*+$ production in Pb–Pb collisions at $\sqrts_\mathrmNN$ = 5.02 TeVстатья

• Авторы:
• Журнал: JHEP
• Том: 1
• Год издания: 2022
• 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