Transverse momentum spectra of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> in heavy-ion collisions

Zhao, Xingbo; Rapp, Ralf

doi:10.1016/j.physletb.2008.03.068

Cited by 123 publications

(56 citation statements)

References 38 publications

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“…This scattering enhances the transverse momentum of gluons and consequently also the transverse momentum of the heavyquark pair. As a result, the distribution in transverse momentum of heavy flavor is smeared in the collisions of nuclei A and B as [16,51] …”

Section: Cold Nuclear Matter Effectsmentioning

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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Section: Cold Nuclear Matter Effectsmentioning

confidence: 99%

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

et al. 2017

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“…For the relaxation factor, it is defined as R(τ ) = 1 − exp[−(τ − τ 0 )/τ eq ] with the relaxation time τ eq = 3 fm/c of charm quarks in the QGP taken from Ref. [7] and τ 0 being the initial thermalization time.…”

Section: The Two-component Modelmentioning

confidence: 99%

“…Since J/ψ suppression was first suggested by Matsui and Satz as a signature of quark-gluon plasma (QGP) formation in relativistic heavy-ion collisions [1], there have been many experimental [2,3] and theoretical studies [4][5][6][7][8] on this very interesting phenomenon; see, e.g., Refs. [9,10] for a recent review.…”

Section: Introductionmentioning

confidence: 99%

Charmonium production in relativistic heavy-ion collisions

Song

Han

2011

Phys. Rev. C

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Using the two-component model that includes charmonium production from both initial nucleonnucleon hard scattering and regeneration in the produced quark-gluon plasma, we study J/ψ production in heavy-ion collisions at the SPS, RHIC and LHC. For the expansion dynamics of produced hot dense matter, we use a schematic viscous hydrodynamic model with the specific shear viscosity in the quark-gluon plasma and the hadronic matter taken, respectively, to be twice and ten times the lower bound of 1/4π suggested by the AdS/CFT correspondence. For the initial dissociation and the subsequent thermal decay of charmonia in the hot dense matter, we use the screened Cornell potential to describe the properties of charmonia and perturbative QCD to calculate their dissociation cross sections. Including regeneration of charmonia in the quark-gluon plasma via a kinetic equation with in-medium chamonium decay widths, we obtain a good description of measured J/ψ nuclear modification factors in Pb+Pb collisions at √ sNN = 1.73 GeV at SPS and in Au+Au collisions at √ sNN = 200 GeV at RHIC. A reasonable description of the measured nuclear modification factor of high transverse momenta J/ψ in Pb+Pb collisions at √ sNN = 2.76 TeV at LHC is also obtained.

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“…The data could also be explained in other ways: e.g., it is possible that a larger part of the directly produced J/ψ was dissolved in the RHIC experiment, but there was some J/ψ produced via recombination (Sec. 3.1), to keep the total yield similar [72]. Other attempts to explain the total yield have used only regeneration [42].…”

Section: Resultsmentioning

confidence: 99%