Color screening and deconfinement for bound states of heavy quarks

Karsch, Frithjof; Mehr, M. T.; Satz, Helmut

doi:10.1007/bf01549722

Cited by 411 publications

(535 citation statements)

References 10 publications

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“…The earliest suggested QGP signal was a disappearance of familiar hadronic peaks -ρ, ω, φ mesons -in the dilepton spectra [1]. Moreover, even small-size deeply-boundcc states, η c , J/ψ, were expected to melt at T ≈ T c [25,26]. However, as we already mentioned in the Introduction, there are indications from the lattice that charmonium and light quarks do create meson-like states at T > T c .…”

Section: Strongly Coupled Trapped Atomsmentioning

confidence: 99%

What RHIC experiments and theory tell us about properties of quark–gluon plasma?

2005

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This brief review summarizes the main experimental discoveries made at RHIC and then discusses their implications. The robust collective flow phenomena are well described by ideal hydrodynamics, with the Equation of State (EoS) predicted by lattice simulations. However the transport properties turned out to be unexpected, with rescattering cross section one-to-two orders of magnitude larger than expected from perturbative QCD. These and other theoretical developments indicate that Quark-Gluon Plasma (QGP) produced at RHIC, and probably in a wider temperature region T c < T < 4T c , is not at all a weakly coupled quasiparticle gas, but is rather in a strongly coupled regime, sQGP for short. After reviewing two other "strongly coupled systems", (i) the strongly coupled supersymmetric theories studied via Maldacena duality; (ii) trapped ultracold atoms with very large scattering length, we return to sQGP and show that there should exist literally hundreds of bound states in it in the RHIC domain, most them colored. We then discuss recent ideas of their effect on the EoS, viscosity and jet quenching.

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Section: Strongly Coupled Trapped Atomsmentioning

confidence: 99%

What RHIC experiments and theory tell us about properties of quark–gluon plasma?

2005

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“…We summarize the corresponding temperature T D that our screening length gives the same value as the screening radius for each quarkonium from Ref. [3] in Table II.…”

Section: B ω = 0 Casementioning

confidence: 99%

“…In the hot quark-gluon plasma, the deconfined charges would modify the interaction between the heavy quark pair such that we expect the colour-screened potential [3] V (r, T ) = (σr D (T )) 1 − e −r/r D (T ) − α eff r e −r/r D (T ) (2) where r D (T ) is the screening radius. When the temperature increases, the screening radius r D (T ) decreases.…”

Section: Introductionmentioning

confidence: 99%

Aspects of the screening length and drag force in two alternative gravity duals of the quark-gluon plasma

Burikham

2007

J. High Energy Phys.

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We compute the screening length of mesons with different angular momentum J from two gravity dual theories. Both the asymptotically AdS 5 and Sakai-Sugimoto metrics are considered in the calculations. Using the dual description of the quark as a classical string ending on the probe brane, we obtain the interacting potential between the heavy quark and antiquark after rotating the background metric. The result shows that the screening length of mesons with different J is well fit to a J /T . The constant a J is determined for J = 0, 1, 2 by taking advantage of numerical techniques. Finally, we calculate the drag force and relaxation times from the Sakai-Sugimoto metric and compare with the ones obtained in the AdS 5 . The application of our result to charmonium and bottomonium at RHIC and LHC is briefly discussed.

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“…The seminal work of Matsui and Satz [2] argued that, in a thermal bath, the binding interaction of the heavy quark-antiquark (QQ)pair is screened by the medium, resulting in the melting of the heavy quarkonia. However, the QQ pair is not necessarily produced at rest in the QGP and the effects of its motion through the plasma must taken into account when considering the effects of the medium in the QQ interaction.…”

Section: Introductionmentioning

confidence: 99%

Thermal suppression of moving heavy quark pairs in a strongly coupled plasma

Finazzo

Noronha

2015

J. High Energ. Phys.

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The imaginary part of the heavy quark-antiquark potential experienced by moving heavy quarkonia in strongly coupled plasmas dual to theories of gravity is computed by considering thermal worldsheet fluctuations of the holographic Nambu-Goto string. General results for a wide class of gravity duals are presented and an explicit formula for Im V QQ is found in the case where the axis of the movingQQ pair has an arbitrary orientation with respect to its velocity in the plasma. These results are applied to the study of heavy quarkonia propagating through a strongly coupled N = 4 SYM plasma. Our results indicate that the onset of Im V QQ decreases with increasing rapidity (though our analysis is limited to slowly moving quarkonia) and that, in general, a QQ pair is more strongly bound if its axis is aligned with its direction of motion through the strongly coupled plasma.

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Color screening and deconfinement for bound states of heavy quarks

Cited by 411 publications

References 10 publications

What RHIC experiments and theory tell us about properties of quark–gluon plasma?

What RHIC experiments and theory tell us about properties of quark–gluon plasma?

Aspects of the screening length and drag force in two alternative gravity duals of the quark-gluon plasma

Thermal suppression of moving heavy quark pairs in a strongly coupled plasma

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