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A data-driven analysis for the temperature and momentum dependence of the heavy quark diffusion coefficient in relativistic heavy-ion collisions

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arxiv 1710.00807 v1 pith:R435QB5X submitted 2017-10-02 nucl-th

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keywords coefficientcollisionsdiffusionanalysisheavyapplyingbayesiandependence
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abstract

By applying a Bayesian model-to-data analysis, we estimate the temperature and momentum dependence of the heavy quark diffusion coefficient in an improved Langevin framework. The posterior range of the diffusion coefficient is obtained by performing a Markov chain Monte Carlo random walk and calibrating on the experimental data of $D$-meson $R_{\mathrm{AA}}$ and $v_2$ in three different collision systems at RHIC and the LHC: AuAu collisions at 200 GeV, PbPb collisions at 2.76 and 5.02 TeV. The spatial diffusion coefficient is found to be consistent with lattice QCD calculations and comparable with other models' estimation. We demonstrate the capability of our improved Langevin model to simultaneously describe the $R_{\mathrm{AA}}$ and $v_2$ at both RHIC and the LHC energies, as well as the higher order flow coefficient such as $D$-meson $v_3$. We show that by applying a Bayesian analysis, we are able to quantitatively and systematically study the heavy flavor dynamics in heavy-ion collisions.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Momentum Dependence of Heavy Quark Diffusion in a Thermal Gluonic Plasma on the Lattice

    hep-lat 2026-06 unverdicted novelty 7.0 of 10

    Lattice simulations of a 3D effective gluonic plasma theory produce the first reported momentum dependence of heavy quark drag and diffusion coefficients in a non-perturbative non-Abelian thermal medium.

  2. Bayesian Inference of Heavy-Quark Dissipation and Jet Transport Parameters from D-Meson observables in heavy-ion collisions at the LHC energies

    nucl-th 2025-12 unverdicted novelty 7.0 of 10

    First simultaneous Bayesian extraction of 2πT D_s and q-hat/T^3 from D-meson R_AA and v2 at 5.02 TeV, yielding a non-monotonic temperature dependence in their ratio that deviates from the expected value of 2.

  3. Stochastic Dynamics of Heavy Quarks in Strongly Coupled Plasma

    hep-ph 2026-06 unverdicted novelty 6.0 of 10

    Kolmogorov dynamics for heavy quarks in hot plasma shows significantly delayed large-momentum equilibration compared to Fokker-Planck with matched drag, due to rare low-momentum-loss events.

  4. Melting of $c \bar c$ and $b \bar b$ pairs in the pre-equilibrium stage of proton-nucleus collisions at the Large Hadron Collider

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Color decorrelation in the evolving glasma melts roughly half of initially singlet charm and bottom quark pairs within about 0.4 to 0.5 fm/c after their formation in proton-nucleus collisions at the LHC.

  5. Constraining Jet Quenching in Heavy-Ion Collisions with Bayesian Inference

    hep-ph 2024-11 conditional novelty 6.0 of 10

    A Bayesian fit to LHC jet data claims a universal jet energy-loss distribution and super-Casimir color dependence, but the color result depends on a theory-informed prior.

  6. The influence of electromagnetic fields on the generation of the directed and elliptic flows of heavy quark in relativistic heavy-ion collisions

    nucl-th 2025-07 conditional novelty 5.0 of 10

    In the PHSD transport model, self-generated electromagnetic fields induce a D meson v1 splitting consistent with STAR within large uncertainties, and a more visible v1 splitting versus pT for charm quarks.

  7. Heavy quark suppression and anisotropic flow at intermediate momentum

    hep-ph 2025-01 conditional novelty 4.0 of 10

    Heavy quark suppression and elliptic flow in noncentral heavy-ion collisions are computed with a unified collisional plus radiative energy-loss model, showing a collisional-to-radiative transition and weaker pT depend...

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