Toward a consistent evolution of the quark-gluon plasma and heavy quarks

Nahrgang, Marlene; Aichelin, J.; Gossiaux, Pol Bernard; Werner, K.

doi:10.1103/physrevc.93.044909

Cited by 36 publications

(33 citation statements)

References 113 publications

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“…Belonging to the non-perturbative realm of QCD, there is no solid first-principle theory to describe hadronization, neither in the vacuum nor in the medium. The latter is modeled in several different ways in the literature -via coalescence [15][16][17], formation of color-singlet clusters/strings [11] or of resonances [18][19][20] -but the qualitative effect is always the same: the light thermal quark involved in the recombination process is part of a fluid cell sharing a common collective velocity and this provides an additional contribution to the (radial, elliptic and also triangular, as will be shown in the paper) flow of the final heavy-flavour hadron. Clearly, recombination with light partons from the medium, besides the kinematic distributions, can also affect the heavy-flavour hadrochemistry in nucleus-nucleus collisions, changing the relative yields of the various species with respect to the proton-proton case.…”

Section: Jhep02(2018)043mentioning

confidence: 99%

Development of heavy-flavour flow-harmonics in high-energy nuclear collisions

Beraudo

Pace

Monteno

et al. 2018

J. High Energ. Phys.

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We employ the POWLANG transport setup, developed over the last few years, to provide new predictions for several heavy-flavour observables in relativistic heavy-ion collisions from RHIC to LHC center-of-mass energies. In particular, we focus on the development of the flow-harmonics v 2 and v 3 arising from the initial geometric asymmetry in the initial conditions and its associated event-by-event fluctuations. Within the same transport framework, for the sake of consistency, we also compare the nuclear modification factor of the p T spectra of charm and beauty quarks, heavy hadrons and their decay electrons. We compare our findings to the most recent data from the experimental collaborations. We also study in detail the contribution to the flow harmonics from the quarks decoupling from the fireball during the various stages of its evolution: although not directly accessible to the experiments, this information can shed light on the major sources of the final measured effect.

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Section: Jhep02(2018)043mentioning

confidence: 99%

Development of heavy-flavour flow-harmonics in high-energy nuclear collisions

Beraudo

Pace

Monteno

et al. 2018

J. High Energ. Phys.

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“…Although it had been expected that the R AA of heavy flavor is less suppressed and its elliptic flow is smaller as compared to the corresponding quantities for light hadrons, the experimental data show that the suppression of heavy-flavor hadrons at high transverse momentum and its elliptic flow v 2 are comparable to those of light hadrons [6,7]. This is a puzzle for heavy-flavor production and dynamics in relativistic heavy-ion collisions as pointed out by many groups [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. For recent reviews we refer the reader to Refs.…”

Section: Introductionmentioning

confidence: 99%

Single electrons from heavy-flavor mesons in relativistic heavy-ion collisions

et al. 2017

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We study the single electron spectra from D− and B−meson semileptonic decays in Au+Au collisions at √ sNN =200, 62.4, and 19.2 GeV by employing the parton-hadron-string dynamics (PHSD) transport approach that has been shown to reasonably describe the charm dynamics at RelativisticHeavy-Ion-Collider (RHIC) and Large-Hadron-Collider (LHC) energies on a microscopic level. In this approach the initial charm and bottom quarks are produced by using the PYTHIA event generator which is tuned to reproduce the fixed-order next-to-leading logarithm (FONLL) calculations for charm and bottom production. The produced charm and bottom quarks interact with off-shell (massive) partons in the quark-gluon plasma with scattering cross sections which are calculated in the dynamical quasi-particle model (DQPM) that is matched to reproduce the equation of state of the partonic system above the deconfinement temperature Tc. At energy densities close to the critical energy density (≈ 0.5 GeV/fm 3 ) the charm and bottom quarks are hadronized into D− and B−mesons through either coalescence or fragmentation. After hadronization the D− and B−mesons interact with the light hadrons by employing the scattering cross sections from an effective Lagrangian. The final D− and B−mesons then produce single electrons through semileptonic decay. We find that the PHSD approach well describes the nuclear modification factor RAA and elliptic flow v2 of single electrons in d+Au and Au+Au collisions at √ sNN = 200 GeV and the elliptic flow in Au+Au reactions at √ sNN = 62.4 GeV from the PHENIX collaboration, however, the large RAA at √ sNN = 62.4 GeV is not described at all. Furthermore, we make predictions for the RAA of D−mesons and of single electrons at the lower energy of √ sNN = 19.2 GeV. Additionally, the medium modification of the azimuthal angle φ between a heavy quark and a heavy antiquark is studied. We find that the transverse flow enhances the azimuthal angular distributions close to φ = 0 because the heavy flavors strongly interact with nuclear medium in relativistic heavy-ion collisions and almost flow with the bulk matter.

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“…The heavy quarks are evolved on top of hydrodynamic backgrounds until they reach the jet-medium decoupling temperature T d below which hadronization is performed using the Peterson fragmentation function [51]. This parameter encodes the large uncertainties regarding hadronization of jets in the qgp and is set to vary between T d = 120 MeV and T d = 160 MeV, inspired by [18,52,53]. The parameter for the Peterson fragmentation function is fixed so that the heavy meson spectra matches fonll calculations.…”

Section: Details Of the Modelmentioning

confidence: 99%

Event-by-event correlations between soft hadrons and D0 mesons in 5.02 TeV PbPb collisions at the CERN Large Hadron Collider

et al. 2017

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In this paper heavy quark energy loss models are embedded in full event-by-event viscous hydrodynamic simulations to investigate the nuclear suppression factor and the azimuthal anisotropy of D 0 mesons in PbPb collisions at √ sNN = 5.02 TeV in the pT range 8-40 GeV. In our model calculations, the RAA of D 0 mesons is consistent with experimental data from the cms experiment. We present the first calculations of heavy flavor cumulants v2{2} and v3{2} (and also discuss v2{4}), which is also consistent with experimental data. Event-shape engineering techniques are used to compute the event-by-event correlation between the soft hadron vn and the heavy meson vn. We predict a linear correlation between these observables on an event-by-event basis.

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Toward a consistent evolution of the quark-gluon plasma and heavy quarks

Cited by 36 publications

References 113 publications

Development of heavy-flavour flow-harmonics in high-energy nuclear collisions

Development of heavy-flavour flow-harmonics in high-energy nuclear collisions

Single electrons from heavy-flavor mesons in relativistic heavy-ion collisions

Event-by-event correlations between soft hadrons and D0 mesons in 5.02 TeV PbPb collisions at the CERN Large Hadron Collider

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