Deconfinement and quarkonium suppression

Karsch, Frithjof

doi:10.1140/epjc/s2005-02192-2

Cited by 27 publications

(36 citation statements)

References 37 publications

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“…From the lattice QCD study on the stability of heavy flavor quarkonium in QGP, J/ψ can survive till the temperature 1.6 T c where T c is the critical temperature for the deconfinement phase transition of the system. 2,3 Many other theoretical studies have also shown similar results as well. 4,5 One effective probe of the produced hot medium in heavy ion collisions is the heavy flavor production.…”

Section: Introductionsupporting

confidence: 68%

Charm Quark Thermalization in Quark-Gluon Plasma

Yan

Zhuang

2007

Int. J. Mod. Phys. E

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Section: Introductionsupporting

confidence: 68%

Charm Quark Thermalization in Quark-Gluon Plasma

Yan

Zhuang

2007

Int. J. Mod. Phys. E

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“…The J/ψ is a particularly sensitive probe of the early stages because its survial probability depends on the environment. Lattice gauge theory calculations have indicated that J/ψs do exist above the critical temperature [8,9].The J/ψ suppression was first proposed as a direct signature to identify the QGP formation twenty years ago [10]. Besides the normal suppression induced by nuclear absorption, the J/ψs initially produced by hard processes are anomalously suppressed [11,12,13,14,15,16,17] by interactions in the hot medium.…”

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confidence: 99%

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confidence: 99%

J/ψProduction in Quark-Gluon Plasma

2006

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We study J/ψ production at RHIC and LHC energies with both initial production and regeneration. We solve the coupled set of transport equation for the J/ψ distribution in phase space and the hydrodynamic equation for evolution of quark-gluon plasma. At RHIC, continuous regeneration is crucial for the J/ψ momentum distribution while the elliptic flow is still dominated by initial production. At LHC energy, almost all the initially created J/ψs are dissociated in the medium and regeneration dominates the J/ψ properties. 12.38.Mh, 24.85.+p The goal of high-energy nuclear collisions is to identify and study the equation of state of the Quark-Gluon Plasma (QGP) which is believed to exist at the early stage of our universe [1]. In √ s N N = 200 GeV Au + Au collisions, the observations of jet-quenching [2] and collective flow have demonstrated the formation of hot and dense matter with partonic collectivity [3,4]. Local thermalization of the system created in heavy ion collisions is yet to be tested. Heavy flavors including charm and bottom quarks are powerful tools [5] for studying the early collision dynamics because their masses are much larger than possible excitation, temperature for example, of the system created in collisions at RHIC. Recent results have shown that heavy flavors are all produced in the initial collisions [6,7]. Therefore, studying open charm and charmonium production will yield important information on the properties of QGP. The J/ψ is a particularly sensitive probe of the early stages because its survial probability depends on the environment. Lattice gauge theory calculations have indicated that J/ψs do exist above the critical temperature [8,9].The J/ψ suppression was first proposed as a direct signature to identify the QGP formation twenty years ago [10]. Besides the normal suppression induced by nuclear absorption, the J/ψs initially produced by hard processes are anomalously suppressed [11,12,13,14,15,16,17] by interactions in the hot medium. While charm quark production at the SPS is expected to be small, there are more than 10 cc pairs produced in a central Au + Au collision at RHIC, and is probably more than 200 pairs at the LHC [18]. These uncorrelated charm quark pairs in the QGP can be recombined to form J/ψs. Obviously, regeneration will enhance the J/ψ yield and alter its momentum spectra. Recently, the regeneration approach for J/ψ production at RHIC has been widely discussed with different models, such as thermal production on the hadronizaton hypersurface according to statistic law [19,20,21], the coalescence mechanism [22] and the kinetic model [23,24] which considers continuous J/ψ regeneration in a QGP.The medium created in high-energy nuclear collisions evolves dynamically. In order to extract information about the medium by analyzing the J/ψ distributions, both the hot and dense medium and the J/ψ production processes must be treated dynamically. In this Letter, we treat continuous regeneration of the J/ψ in a QGP self-consistently, including hydrodynamic evolution of t...

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“…The ratios of high-order cumulants (from the 3rd to the 6th order ones) of conserved quantities are suggested as sensitive measurements of the QCD phase transition [1,2,3,4,5,6,7,8]. Recently, the ratios of low-order cumulants (from the 1st to the 3rd order ones) are turned out to be a useful probe of freeze-out temperatures [9,10]. So it is important to precisely determine the cumulants experimentally, and subtract the influence of non-critical effects.…”

Section: Introductionmentioning

confidence: 99%

Influences of statistics and initial size fluctuation on high-order cumulants of conserved quantities in relativistic heavy ion collisions

Chen¹,

Li²,

Wu³

2014

J. Phys. G: Nucl. Part. Phys.

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By the generator of the UrQMD model, event statistics for the products of kurtosis (κ) and variance (σ 2 ) of net-proton and net-charge multiplicity distributions are carefully studied. It is shown that the statistics at RHIC/BES below √ s N N < 19.6GeV are not sufficient for using the method of Centrality Bin Width Correction (CBWC). Corresponding results are systematically underestimated. A way to improve the CBWC method is proposed. It can remove the statistics dependence of the data and reduce the initial size fluctuation as well.

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Deconfinement and quarkonium suppression

Cited by 27 publications

References 37 publications

Charm Quark Thermalization in Quark-Gluon Plasma

Charm Quark Thermalization in Quark-Gluon Plasma

J/ψProduction in Quark-Gluon Plasma

Influences of statistics and initial size fluctuation on high-order cumulants of conserved quantities in relativistic heavy ion collisions

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