Observation of $D^0$ meson nuclear modifications in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV

Abstract : 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, $N_{bin}$, 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 $N_{bin}$, 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 $p_{T}$ is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00983263
Contributor : Sylvie Flores <>
Submitted on : Friday, April 25, 2014 - 7:02:35 AM
Last modification on : Wednesday, July 21, 2021 - 3:46:22 AM

Citation

L. Adamczyk, J. k. Adkins, G. Agakishiev, M. m. Aggarwal, Z. Ahammed, et al.. Observation of $D^0$ meson nuclear modifications in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV. Physical Review Letters, American Physical Society, 2014, 113 (14), pp.142301. ⟨10.1103/PhysRevLett.113.142301⟩. ⟨in2p3-00983263⟩

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