The bound states and instanton molecules at T≳Tc

Brown, G. E.; Lee, Chang-Hwan; Rho, Mannque; Shuryak, Edward

doi:10.1016/j.nuclphysa.2004.04.116

Cited by 59 publications

(54 citation statements)

References 44 publications

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“…In another paper, by Brown et al [28], the fate of theqq bound states is traced to T ≈ T c , where Fig.1(a). The lower solid curve is the contribution of unbound quasiparticles, the upper includes also that of all bound states.…”

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

Self Cite

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“…In a more recent paper, by Brown et al [3], the fate of theqq bound states is traced to T ≈ T c , where the Nambu-Goldstone and Wigner-Weyl modes meet. the binding of these states is accomplished by the combination of (i) the color Coulomb interaction, (ii) the relativistic effects, and (iii) the quasi-local interaction induced by the instanton-anti-instanton molecules.…”

Section: Rethinking the Qgp At Rhic T C < T < 2t Cmentioning

confidence: 99%

“…I.Zahed and myself [2] suggested an explanation to hydro regime of QGP, related it with presence of loosely bound pairs of quasiparticles which generate large scattering lengths. These ideas are further developed by Brown et al [3]. However this is just a part of developments in other fields of physics, which happen to be quite recent as well.…”

Section: Introductionmentioning

confidence: 97%

Why does the quark?gluon plasma at RHIC behave as a nearly ideal fluid?

SHURYAK¹

2004

Progress in Particle and Nuclear Physics

123

190

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The lecture is a brief review of the following topics: (i) collective flow phenomena in heavy ion collisions. The data from RHIC indicate robust collective flows, well described by hydrodynamics with expected Equation of State. The transport properties turned out to be unexpected, with very small viscosity; (ii) physics of highly excited matter produced in heavy ion collisions at T c < T < 4T c is different from weakly coupled quark-gluon plasma because of relatively strong coupling generating bound states of quasiparticles; (iii) wider discussion of other "strongly coupled systems" including strongly coupled supersymmetric theories studied via Maldacena duality, as well as recent progress in trapped atoms with very large scattering length.

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“…Since the c quark is rather heavy, this would be quite remarkable and could provide important insight into (nonperturbative) properties of the QGP at moderate temperatures, T 1-2T c . For example, in the light-quark sector, parton rescattering through hadron-like states in the QGP (motivated by recent lattice calculations of QCD at finite temperature) has been suggested as a mechanism to enhance partonic cross sections [12][13][14] to facilitate rapid thermalization of the bulk matter at RHIC as required in hydrodynamical models. The notion of charmonium resonances in the QGP [15,16] has been applied earlier to assess J /ψ production at the CERN super proton synchrotron (SPS) and RHIC [17].…”

Section: Introductionmentioning

confidence: 99%

Thermalization of heavy quarks in the quark-gluon plasma

2005

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Charm-and bottom-quark rescattering in a quark-gluon plasma (QGP) is investigated with the objective of assessing the approach toward thermalization. Employing a Fokker-Planck equation to approximate the collision integral of the Boltzmann equation we augment earlier studies based on perturbative parton cross sections by introducing resonant heavy-light quark interactions. The latter are motivated by recent QCD lattice calculations that indicate the presence of "hadronic" states in the QGP. We model these states by colorless (pseudo-) scalar and (axial-) vector D and B mesons within a heavy-quark effective theory framework. We find that the presence of these resonances at moderate QGP temperatures substantially accelerates the kinetic equilibration of c quarks as compared to using perturbative interactions. We also comment on consequences for D-meson observables in ultrarelativistic heavy-ion collisions.

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The bound states and instanton molecules at T≳Tc

Cited by 59 publications

References 44 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?

Why does the quark?gluon plasma at RHIC behave as a nearly ideal fluid?

Thermalization of heavy quarks in the quark-gluon plasma

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