Prompt D$^{0}$, D$^{+}$, and D$^{*+}$ production in Pb–Pb collisions at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV

The ALICE collaboration
JHEP 01 (2022) 174, 2022.

Abstract (data abstract)
CERN LHC. The production of prompt D$^{0}$, 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 $\sqrt{s_\mathrm{NN}}=5.02$ 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 ($p_\mathrm{T}$) 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 D$^{0}$ mesons was measured down to $p_\mathrm{T} =$ 0, which allowed a model-independent determination of the $p_\mathrm{T}$-integrated yield per unit of rapidity (d$N$/d$y$). A maximum suppression by a factor 5 and 2.5 was observed with the nuclear modification factor ($R_{\mathrm{AA}}$) of prompt D mesons at $p_\mathrm{T} =$ 6-8 GeV/$c$ for the 0-10% and 30-50% centrality classes, respectively. The D-meson $R_{\mathrm{AA}}$ is compared with that of charged pions, charged hadrons, and J/$\psi$ mesons as well as with theoretical predictions. The analysis of the agreement between the measured $R_{\mathrm{AA}}$, elliptic ($v_{2}$) and triangular ($v_{3}$) flow, and the model predictions allowed us to constrain the charm spatial diffusion coefficient $D_{s}$. Furthermore the comparison of $R_{\mathrm{AA}}$ and $v_{2}$ 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.

  • Table 1

    Data from Figure 4 left panel (filled cross)

    10.17182/hepdata.127979.v1/t1

    Transverse momentum distributions d$N$/(d$y$d$p_{\mathrm{T}}$) of prompt D$^{0}$ (left) meson in the 0-10% (crosses) centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$...

  • Table 2

    Data from Figure 4 left panel (filled diamond)

    10.17182/hepdata.127979.v1/t2

    Transverse momentum distributions d$N$/(d$y$d$p_{\mathrm{T}}$) of prompt D$^{0}$ (left) meson in the 30-50% (diamonds) centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$...

  • Table 3

    Data from Figure 4 middle panel (filled cross)

    10.17182/hepdata.127979.v1/t3

    Transverse momentum distributions d$N$/(d$y$d$p_{\mathrm{T}}$) of prompt D$^{+}$ (middle) meson in the 0-10% (crosses) centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$...

  • Table 4

    Data from Figure 4 middle panel (filled diamond)

    10.17182/hepdata.127979.v1/t4

    Transverse momentum distributions d$N$/(d$y$d$p_{\mathrm{T}}$) of prompt D$^{+}$ (middle) meson in the 30-50% (diamonds) centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$...

  • Table 5

    Data from Figure 4 right panel (filled cross)

    10.17182/hepdata.127979.v1/t5

    Transverse momentum distributions d$N$/(d$y$d$p_{\mathrm{T}}$) of prompt D*$^{+}$ (right) meson in the 0-10% (crosses) centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$...

  • Table 6

    Data from Figure 4 right panel (filled diamond)

    10.17182/hepdata.127979.v1/t6

    Transverse momentum distributions d$N$/(d$y$d$p_{\mathrm{T}}$) of prompt D*$^{+}$ (right) meson in the 30-50% (diamonds) centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$...

  • Table 7

    Data from Figure 5 top left panel (red circle)

    10.17182/hepdata.127979.v1/t7

    Ratio D$^{+}$/D$^{0}$ in central Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in |y|<0.5 and as a function of $p_\mathrm{T}$. Statistical (bars) and...

  • Table 8

    Data from Figure 5 top left panel (orange square)

    10.17182/hepdata.127979.v1/t8

    Ratio D$^{+}$/D$^{0}$ in semicentral Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in |y|<0.5 and as a function of $p_\mathrm{T}$. Statistical (bars) and...

  • Table 9

    Data from Figure 5 bottom left panel (red circle)

    10.17182/hepdata.127979.v1/t9

    Ratio D*$^{+}$/D$^{0}$ in central Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in |y|<0.5 and as a function of $p_\mathrm{T}$. Statistical (bars) and...

  • Table 10

    Data from Figure 5 bottom left panel (orange square)

    10.17182/hepdata.127979.v1/t10

    Ratio D*$^{+}$/D$^{0}$ in semicentral Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in |y|<0.5 and as a function of $p_\mathrm{T}$. Statistical (bars) and...

  • Table 11

    Data from Figure 6 left panel (red square)

    10.17182/hepdata.127979.v1/t11

    Nuclear modification factor of D$^{0}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 0-10% centrality class, in |y|<0.5 and...

  • Table 12

    Data from Figure 6 left panel (green triangle)

    10.17182/hepdata.127979.v1/t12

    Nuclear modification factor of D$^{+}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 0-10% centrality class, in |y|<0.5 and...

  • Table 13

    Data from Figure 6 left panel (blue circle)

    10.17182/hepdata.127979.v1/t13

    Nuclear modification factor of D*$^{+}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 0-10% centrality class, in |y|<0.5 and...

  • Table 14

    Data from Figure 6 right panel (red square)

    10.17182/hepdata.127979.v1/t14

    Nuclear modification factor of D$^{0}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 30-50% centrality class, in |y|<0.5 and...

  • Table 15

    Data from Figure 6 right panel (green triangle)

    10.17182/hepdata.127979.v1/t15

    Nuclear modification factor of D$^{+}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 30-50% centrality class, in |y|<0.5 and...

  • Table 16

    Data from Figure 6 right panel (blue circle)

    10.17182/hepdata.127979.v1/t16

    Nuclear modification factor of D*$^{+}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 30-50% centrality class, in |y|<0.5 and...

  • Table 17

    Data from Figure 7 left panel (red diamond)

    10.17182/hepdata.127979.v1/t17

    Average nuclear modification factor of D$^{0}$, D$^{+}$ and D*$^{+}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 0-10% centrality...

  • Table 18

    Data from Figure 7 left panel (orange square)

    10.17182/hepdata.127979.v1/t18

    Average nuclear modification factor of D$^{0}$, D$^{+}$ and D*$^{+}$ meson in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in the 30-50% centrality...

  • Table 19

    Data from Figure 8

    10.17182/hepdata.127979.v1/t19

    $p_\mathrm{T}$-integrated nuclear modification factor of D$^{0}$ meson in central (0-10%) and semicentral (30-50%) Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV, in |y|<0.5.

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