Abstract
We present the first measurement of the nuclear modification factor RAA and elliptic flow v2 of Ds in Au+Au collisions at sNN=200 GeV with the STAR detector. These results have been compared with those of other open charm mesons and strange mesons to determine how the (possibly) strangeness equilibrated partonic matter affects the Ds meson production. We find that the nuclear modification factor of DS are systematically higher than unity and that of D0. The ratio Ds/D0 is shown as a function of transverse momentum for the 10–40% most central Au+Au collisions and compared with that in p+p collisions obtained from PYTHIA. It is also compared with that in Pb+Pb collisions at 2.76 TeV by the ALICE experiment. Our measurement indicates a hint of enhancement of DS production in Au+Au collisions with respect to p+p collisions as compared to non-strange D mesons.
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