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

Abstract

Heavy-flavor quarks are dominantly produced in initial hard scattering processes and experience the whole evolution of the system in heavy-ion collisions at RHIC energies. Thus they are suggested to be an excellent probe to the medium properties through their interaction with the medium. In this proceedings, we report our first measurement of $D^0$ production via topological reconstruction using STAR's recently installed Heavy Flavor Tracker (HFT). We also report our new measurement of Nuclear Modification Factor ($R_{AA}$) of $D^0$ mesons in central Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV as a function of transverse momentum ($p_T$). New results confirm the strong suppression at high $p_T$ with a much improved precision, and show that the $R_{AA}$ at high $p_T$ are comparable with light hadrons ($\pi$) and with D meson measurements at the LHC. Furthermore, several theoretical calculations are compared to our data, and with charm diffusion coefficient 2$\pi T{D}_S$ $\sim$ 2-12 can reproduce both the $D^0$ $R_{AA}$ and $v_2$ data in Au+Au collisions at RHIC.

Quark Matter 2015 conference

References in corpus (5)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Observation of $D^0$ meson nuclear modifications in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 200 GeV
• Energy loss, hadronization and hadronic interactions of heavy flavors in relativistic heavy-ion collisions
• Transverse momentum dependence of D-meson production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• The total charm cross section

Cited by in corpus (9)

• Towards the determination of heavy-quark transport coefficients in quark-gluon plasma
• Heavy and light flavor jet quenching at RHIC and LHC energies
• A data-driven analysis for the temperature and momentum dependence of the heavy quark diffusion coefficient in relativistic heavy-ion collisions
• A linearized Boltzmann--Langevin model for heavy quark transport in hot and dense QCD matter
• Radiative heavy quark energy loss in an expanding viscous QCD plasma
• A data-driven analysis of the heavy quark transport coefficient
• Longitudinal momentum fraction of heavy-flavor mesons in jets in high-energy nuclear collisions
• Production of Charm Quarks in a Parton Cascade Model for Relativistic Heavy Ion Collisions at $\sqrt{s_{\text{NN}}}$= 200 GeV
• Measurement of $D^0$ Meson Production and Azimuthal Anisotropy in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV