Measurement of D$^0$-meson + hadron two-dimensional angular correlations in Au+Au collisions at $\sqrt{s_{\rm NN}} = $ 200 GeV
Phys.Rev.C 102 (2020) 014905 , 2020.
The STAR collaboration

Abstract (data abstract)
BNL-RHIC. Two-dimensional angular correlations of D0-mesons with charged hadrons, projected on delEta and delPhi at sNN−−−sqrt=200GeV in STAR are presented. The correlations are fit with a 2D function containing components to capture the 2D jet-peak (Gaussian on delEta and delPhi), the azimuthal harmonics (dipole, quadrupole), and the constant offset. These fits are performed on the data in the three presented centrality bins, and the evolution of these extracted fit values with centrality discussed. Additionally, the per-trigger, near side yield (i.e. the per-trigger yield in the jet-like peak) is extracted and centrality evolution presented. The results indicate strong interaction of the charm-quark or D0-meson with the medium.

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