Heavy quark transport in heavy ion collisions at RHIC and LHC within the UrQMD transport model

Abstract

We have implemented a Langevin approach for the transport of heavy quarks in the UrQMD hybrid model. The UrQMD hybrid approach provides a realistic description of the background medium for the evolution of relativistic heavy ion collisions. We have used two different sets of drag and diffusion coefficients, one based on a $T$-Matrix approach and one based on a resonance model for the elastic scattering of heavy quarks within the medium. In case of the resonance model we have investigated the effects of different decoupling temperatures of the heavy quarks from the medium, ranging between $130\text{MeV}$ and $180\text{MeV}$. We present calculations of the nuclear modification factor $R_{AA}$, as well as of the elliptic flow $v_2$ in Au+Au collisions at $\sqrt{s_{NN}}=200\text{GeV}$ and Pb+Pb collisions at $\sqrt{s_{NN}}=2.76\text{TeV}$. To make our results comparable to experimental data at RHIC and LHC we have implemented a Peterson fragmentation and a quark coalescence approach followed by the semileptonic decay of the D- and B-mesons to electrons. We find that our results strongly depend on the decoupling temperature and the hadronization mechanism. At a decoupling temperature of $130\text{MeV}$ we reach a good agreement with the measurements at both, RHIC and LHC energies, simultaneously for the elliptic flow $v_2$ and the nuclear modification factor $R_{AA}$.

20 pages, 28 figures

References in corpus (22)

• PYTHIA 6.4 Physics and Manual
• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Thermal Dileptons at LHC
• Heavy-Quark Kinetics in the QGP at LHC
• Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Towards an understanding of the RHIC single electron data
• Relativistic Brownian Motion
• ${\mathbf{D}}_{\mathbf{s}}$-Meson as Quantitative Probe of Diffusion and Hadronization in Nuclear Collisions
• Particlization in hybrid models
• Open heavy flavor in Pb+Pb collisions at sqrt(s)=2.76 TeV within a transport model
• Eccentricity fluctuations from the Color Glass Condensate at RHIC and LHC
• Azimuthal correlations of heavy quarks in Pb+Pb collisions at LHC ($\sqrt{s}=2.76$ TeV)
• Importance of Granular Structure in the Initial Conditions for the Elliptic Flow
• (3+1)-Dimensional Hydrodynamic Expansion with a Critical Point from Realistic Initial Conditions
• Constraining the initial state granularity with bulk observables in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV
• Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach
• Relativistic Langevin Dynamics in Expanding Media
• Eccentricity fluctuations in an integrated hybrid approach: Influence on elliptic flow
• Heavy-flavor suppression and azimuthal anisotropy in Pb-Pb collisions at sqrt(s_{NN}) = 2.76 TeV with the ALICE detector
• Novel heavy flavor suppression mechanisms in the QGP
• T-matrix approach to heavy quark diffusion in the QGP
• Negative Elliptic Flow of $J/\psi$'s: A Qualitative Signature for Charm Collectivity at RHIC

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