Orateur
Description
Heavy quarks are produced in hard partonic scatterings at the very early stage of heavy-ion collisions and they experience the whole evolution of the Quark-Gluon Plasma medium. Femtoscopic correlations, i.e. two-particle correlations at low relative momentum, are sensitive to the final-state interactions as well as to the extent of the region from which the correlated particles are emitted. A study of correlations between heavy-flavor mesons and identified charged hadrons could shed light on their interactions in the hadronic phase.
STAR has performed the first measurement of femtoscopic correlation between $D^0$-hadron pairs at mid-rapidity in Au+Au collisions at ${\sqrt{s_{\mathrm{NN}}}}$ = 200 GeV. $D^0$ mesons are reconstructed via the $K^{\mp}-{\pi}^{\pm}$ decay channel using topological criteria enabled by the Heavy Flavor Tracker with excellent track pointing resolution. We will present the femtoscopic correlation functions between $D^{0}/\overline{D^0}$-$\pi^{\pm}$, $D^{0}/\overline{D^0}$-$K^{\pm}$ and $D^{0}/\overline{D^0}$-$p^{\pm}$ pairs for $D^0$/$\overline{D^0}$ with transverse momentum above 1 GeV/c in the $0-80\%$ centrality range. STAR results will be compared with existing theory predictions and its physics implications will also be discussed.
