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Transverse-momentum and event-shape dependence of D-meson flow harmonics in Pb–Pb collisions at $\sqrt {s_{NN}}$ = 5.02 TeV

The ALICE collaboration
Phys.Lett.B 813 (2021) 136054, 2021.

Abstract (data abstract)
CERN LHC. The elliptic and triangular flow coefficients $v_2$ and $v_3$ of prompt $\mathrm{D}^0$, $\mathrm{D}^+$, and $\mathrm{D}^{*+}$ mesons were measured at mid rapidity ($|y|<0.8$) in Pb-Pb collisions at the centre-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}}=5.02$ TeV with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays in the transverse momentum interval $1<p_\mathrm{T}<36$ GeV$/c$ in central (0-10%) and semi-central (30-50%) collisions. Compared to pions, protons, and $\mathrm{J}/\psi$ mesons, the D-meson $v_\mathrm{n}$ harmonics are found to follow a mass ordering for $p_\mathrm{T}<3$ GeV$/c$, and to be similar to those of pions for higher $p_\mathrm{T}$. The coupling of the charm quark to the light quarks in the underlying medium is further investigated with the application of the event-shape engineering (ESE) technique to the D-meson $v_2$ and $p_\mathrm{T}$-differential yields. The D-meson $v_2$ is correlated with the average bulk elliptic flow in both central and semi-central collisions. Within the current precision, the ratios of per-event D-meson yields in the ESE-selected and unbiased samples are found to be compatible with unity. All the measurements are found to be reasonably well described by theoretical calculations including the effects of charm-quark transport and the recombination of charm quarks with light quarks in a hydrodynamically expanding medium.

  • Table 1

    Data from Figure 2 top-left panel (black circles)

    10.17182/hepdata.105256.v1/t1

    Average $v_2${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 2

    Data from Figure 2 top-right panel (black circles)

    10.17182/hepdata.105256.v1/t2

    Average $v_2${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 3

    Data from Figure 2 bottom-left panel (black circles)

    10.17182/hepdata.105256.v1/t3

    Average $v_3${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 4

    Data from Figure 2 bottom-right panel (black circles)

    10.17182/hepdata.105256.v1/t4

    Average $v_3${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 5

    Data from Figure 4 top-left panel (blue squares)

    10.17182/hepdata.105256.v1/t5

    Average $v_2${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 6

    Data from Figure 4 top-right panel (red diamonds)

    10.17182/hepdata.105256.v1/t6

    Average $v_2${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 7

    Data from Figure 4 bottom-left panel (blue squares)

    10.17182/hepdata.105256.v1/t7

    Average $v_2${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 8

    Data from Figure 4 bottom-right panel (red diamonds)

    10.17182/hepdata.105256.v1/t8

    Average $v_2${SP} vs. $p_\mathrm{T}$ of prompt D$^0$, D$^+$, and D$^{*+}$ mesons in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV in the centrality...

  • Table 9

    Data from Figure 5 top-left panel (blue squares)

    10.17182/hepdata.105256.v1/t9

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $v_2${SP} in the 20% small-$q_2$ sample and the unbiased sample vs....

  • Table 10

    Data from Figure 5 top-right panel (red diamonds)

    10.17182/hepdata.105256.v1/t10

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $v_2${SP} in the 20% large-$q_2$ sample and the unbiased sample vs....

  • Table 11

    Data from Figure 5 bottom-left panel (blue squares)

    10.17182/hepdata.105256.v1/t11

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $v_2${SP} in the 20% small-$q_2$ sample and the unbiased sample vs....

  • Table 12

    Data from Figure 5 bottom-right panel (red diamonds)

    10.17182/hepdata.105256.v1/t12

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $v_2${SP} in the 20% large-$q_2$ sample and the unbiased sample vs....

  • Table 13

    Data from Figure 5 top-left panel (blue squares)

    10.17182/hepdata.105256.v1/t13

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $\mathrm{d}N/\mathrm{d}p_\mathrm{T}$ in the 20% small-$q_2$ sample and the unbiased sample vs....

  • Table 14

    Data from Figure 5 top-right panel (red diamonds)

    10.17182/hepdata.105256.v1/t14

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $\mathrm{d}N/\mathrm{d}p_\mathrm{T}$ in the 20% large-$q_2$ sample and the unbiased sample vs....

  • Table 15

    Data from Figure 5 bottom-left panel (blue squares)

    10.17182/hepdata.105256.v1/t15

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $\mathrm{d}N/\mathrm{d}p_\mathrm{T}$ in the 20% small-$q_2$ sample and the unbiased sample vs....

  • Table 16

    Data from Figure 5 bottom-right panel (red diamonds)

    10.17182/hepdata.105256.v1/t16

    Ratio of average prompt D$^0$, D$^+$, and D$^{*+}$ meson $\mathrm{d}N/\mathrm{d}p_\mathrm{T}$ in the 20% large-$q_2$ sample and the unbiased sample vs....

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