Heavy quarks thermalization in heavy-ion ultrarelativistic collisions: elastic or radiative?

We construct a theoretical framework to describe the evolution of heavy flavors produced in relativistic heavy-ion collisions. The in-medium energy loss of heavy quarks is described using our modified Langevin equation that incorporates both quasi-elastic scatterings and the medium-induced gluon radiation. The space-time profiles of the fireball is described by a (2+1)-dimensional hydrodynamics simulation. A hybrid model of fragmentation and coalescence is utilized for heavy quark hadronization, after which the produced heavy mesons together with the soft hadrons produced from the bulk QGP are fed into the hadron cascade UrQMD model to simulate the subsequent hadronic interactions. We find that the medium-induced gluon radiation contributes significantly to heavy quark energy loss at high pT; heavy-light quark coalescence enhances heavy meson production at intermediate pT; and scatterings inside the hadron gas further suppress the D meson RAA at large pT and enhance its v2. Our calculations provide good descriptions of heavy meson suppression and elliptic flow observed at both the LHC and RHIC.

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“…And alternative approaches of including the radiative energy loss into the Langevin framework can be found in Refs. [56,57].…”

Section: Heavy Quark Energy Loss In a Qgp Matter A A Modified Lamentioning

confidence: 99%

Energy loss, hadronization, and hadronic interactions of heavy flavors in relativistic heavy-ion collisions

2015

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“…(17) and (18), and together with the assumption that the equilibrium distribution is the Boltzmann distribution (i.e., = E/T ), Eq. (22) becomes…”

Section: The D-meson Transport Coefficientsmentioning

confidence: 99%

“…The large masses of charm (c) and bottom (b) quarks motivated different authors to calculate the time evolution of the distribution function of heavy quarks in a plasma by a Fokker-Planck (FP) equation [14][15][16][17][18][19][20][21][22][23][24]. In such an approach the drag and diffusion coefficients depend on the temperature of the expanding plasma and the momentum of the heavy quark.…”

Section: Introductionmentioning

confidence: 99%

D-meson propagation in hadronic matter and consequences for heavy-flavor observables in ultrarelativistic heavy-ion collisions

Ozvenchuk

Torres-Rincón²,

Gossiaux³

et al. 2014

Phys. Rev. C

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International audienceWe employ recently published cross sections for D mesons with hadrons and calculate the drag and diffusion coefficients of D mesons in hadronic matter as a function of the momentum of D mesons as well as of the temperature of the medium. Calculating in our approach the spatial diffusion coefficient, D-x, at zero chemical potential we see a very smooth transition between our calculations for the hadron gas and the lattice QCD calculations. Applying the results for the transport coefficients of D mesons in a Fokker-Planck equation, which describes the evolution of D mesons during the expansion of a hadron gas created in ultrarelativistic heavy-ion collisions, we find that the value of R-AA is little influenced by hadronic rescattering, whereas in the elliptic flow the effects are stronger. We extend our calculations to the finite chemical potentials and calculate the spatial diffusion coefficients of D mesons propagating through the hadronic medium following isentropic trajectories, appropriate at future FAIR (Facility for Antiproton and Ion Research, Darmstadt) and NICA (Nuclotron-Based Ion Collider Facility, Dubna) heavy-ion experiments. For the isentropic trajectory with s/rho(net)(B) = 20 we find a perfect matching of results for D mesons in hadronic matter and for charm quarks in partonic matter treated within the dynamical quasiparticle model approach

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“…This should make them a valuable probe for the properties of the initial nuclear effects, pre-equilibrium dynamics and QGP, which also depend on the reaction plane. It is also not yet established that heavy quarks will completely thermalize in the plasma formed at RHIC and LHC energies [25,26]. Thus, the azimuthal correlation of heavy quarks integrated over p T may be reasonably immune to the energy loss suffered by them and carry information on initial nuclear effects and geometry.…”

Section: Introductionmentioning

confidence: 99%

Azimuthal correlations of D-mesons in p+p and p+Pb collisions at LHC energies

et al. 2017

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We study the correlations of D mesons produced in p+p and p+Pb collisions. These are found to be sensitive to the effects of the cold nuclear medium and the transverse momentum (p T ) regions we are looking into. In order to put this on a quantitative footing, as a first step we analyse the azimuthal correlations of D meson-charged hadron(Dh), and then predict the same for D meson -anti D meson (DD) pairs in p+p and p+Pb collisions with strong coupling at leading order O(α 2 s ) and next to leading order O(α 3 s ) which includes space-time evolution (in both systems), as well cold nuclear matter effects (in p+Pb). This also sets the stage and baseline for the identification and study of medium modification of azimuthal correlations in relativistic collision of heavy nuclei at the Large Hadron Collider.

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Heavy quarks thermalization in heavy-ion ultrarelativistic collisions: elastic or radiative?

Cited by 40 publications

References 13 publications

Energy loss, hadronization, and hadronic interactions of heavy flavors in relativistic heavy-ion collisions

Energy loss, hadronization, and hadronic interactions of heavy flavors in relativistic heavy-ion collisions

D-meson propagation in hadronic matter and consequences for heavy-flavor observables in ultrarelativistic heavy-ion collisions

Azimuthal correlations of D-mesons in p+p and p+Pb collisions at LHC energies

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