Observation of $D^0$ Meson Nuclear Modifications in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV

The collaboration
Phys.Rev.Lett. 113 (2014) 142301, 2014.

Abstract (data abstract)
BNL-RHIC. We report the first measurement of charmed-hadron ($D^0$) production via the hadronic decay channel ($D^0\rightarrow K^- + \pi^+$) in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV with the STAR experiment. The charm production cross-section per nucleon-nucleon collision at mid-rapidity scales with the number of binary collisions, $N_{\mathrm{bin}}$, from p+p to central Au+Au collisions. The $D^0$ meson yields in central Au+Au collisions are strongly suppressed compared to those in p+p scaled by $N_{\mathrm{bin}}$, for transverse momenta $p_{T}>3$ GeV/$c$, demonstrating significant energy loss of charm quarks in the hot and dense medium. An enhancement at intermediate $p_{\rm T}$ is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements.

• #### Table 0

Data from updated Figure 2 for the p+p collisions

10.17182/hepdata.73474.v2/t1

$D^0$ $p_{\rm T}$ differential invariant yield in p+p collisions (open circles), which has been updated with the latest global analysis...

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Data from updated Figure 2 for the Au+Au collisions

10.17182/hepdata.73474.v2/t2

Centrality dependence of the $D^0$ $p_{\rm T}$ differential invariant yield in Au+Au collisions (solid symbols). The curves are number-of-binary-collision-scaled Levy...

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Data from updated Figure 3

10.17182/hepdata.73474.v2/t3

Panels (ab), $D^0$ $R_{\rm AA}$ for peripheral 40$-$80% and semi a central 10$-$40% collisions; Panel (c), $D^0$ $R_{\rm AA}$ for...

• #### Table 3

Data from updated Figure 4

10.17182/hepdata.73474.v2/t4

Integrated $D^0$ $R_{\rm AA}$ as a function of $N_{\mathrm{part}}$ in different $p_{\rm T}$ regions, 0$-$8 ${\mathrm{GeV/}}c$ (squares), 0.7$-$2.2 ${\mathrm{GeV/}}c$ (diamonds)...

Version 2 modifications: This new version is to replace incorrect data points from the original paper (PRL 113, 142301 (2014)) with the corrected ones from the erratum (PRL 121, 229901(E) (2018)).