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Transport properties of anisotropically expanding quark-gluon plasma within a quasi-particle model
Nuclear Theory · Submitted 23 Feb 2012
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Both $\eta$, and $\zeta$ are shown to be equally significant for the temperatures that are accessible in the relativistic heavy ion collision experiments, and hence play crucial role while investigating the properties of the quark-gluon plasma.
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The abstract, sentence by sentence
The bulk and shear viscosities ($\eta$ and $\zeta$) have been studied for quark-gluon-plasma produced in relativistic heavy ion collisions within semi-classical transport theory, in a recently proposed quasi-particle model of (2+1)-flavor lattice QCD equation of state. These transport parameters have been found to be highly sensitive to the interactions present in hot QCD. Contributions to the transport coefficients from both the gluonic sector and the matter sector have been investigated. The matter sector is found to be significantly dominating over the gluonic sector, in both the cases of $\eta$ and $\zeta$. The temperature dependences of the quantities, $\zeta/{\mathcal S}$, and $\zeta/\eta$ indicate a sharply rising trend for the $\zeta$, closer to the QCD transition temperature. Both $\eta$, and $\zeta$ are shown to be equally significant for the temperatures that are accessible in the relativistic heavy ion collision experiments, and hence play crucial role while investigating the properties of the quark-gluon plasma.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The bulk and shear viscosities ($\eta$ and $\zeta$) have been studied for quark-gluon-plasma produced in relativistic heavy ion collisions within semi-classical transport theory, in a recently proposed quasi-particle model of (2+1)-flavor lattice QCD equation of state. | contribution 0.91 | 0.87 | 0.04 | asserted 1.00 |
| s1 | These transport parameters have been found to be highly sensitive to the interactions present in hot QCD. | result 0.84 | 0.70 | 0.10 | asserted 1.00 |
| s2 | Contributions to the transport coefficients from both the gluonic sector and the matter sector have been investigated. | contribution 0.93 | 0.87 | 0.05 | asserted 0.97 |
| s3 | The matter sector is found to be significantly dominating over the gluonic sector, in both the cases of $\eta$ and $\zeta$. | result 1.00 | 0.94 | 0.28 | asserted 1.00 |
| s4 | The temperature dependences of the quantities, $\zeta/{\mathcal S}$, and $\zeta/\eta$ indicate a sharply rising trend for the $\zeta$, closer to the QCD transition temperature. | result 1.00 | 0.88 | 0.17 | asserted 0.54 |
| s5 | Both $\eta$, and $\zeta$ are shown to be equally significant for the temperatures that are accessible in the relativistic heavy ion collision experiments, and hence play crucial role while investigating the properties of the quark-gluon plasma. | interpretation 0.80 | 0.85 | 0.37 | asserted 1.00 |
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The paper
Original abstract
The bulk and shear viscosities ($\eta$ and $\zeta$) have been studied for quark-gluon-plasma produced in relativistic heavy ion collisions within semi-classical transport theory, in a recently proposed quasi-particle model of (2+1)-flavor lattice QCD equation of state. These transport parameters have been found to be highly sensitive to the interactions present in hot QCD. Contributions to the transport coefficients from both the gluonic sector and the matter sector have been investigated. The matter sector is found to be significantly dominating over the gluonic sector, in both the cases of $\eta$ and $\zeta$. The temperature dependences of the quantities, $\zeta/{\mathcal S}$, and $\zeta/\eta$ indicate a sharply rising trend for the $\zeta$, closer to the QCD transition temperature. Both $\eta$, and $\zeta$ are shown to be equally significant for the temperatures that are accessible in the relativistic heavy ion collision experiments, and hence play crucial role while investigating the properties of the quark-gluon plasma.
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References
How the literature uses it
3 arXiv papers cite this in 4 sentences
Papers citing it · 3 sentences without a confident label
Compares with it 1 paper
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We note that a similar but quantitatively different pattern was reported in [ref] .
Quark Flavour Dependence of the Shear Viscosity in a Quasiparticle Model · Flavour dependence of the specific shear viscosity · 0.99
What it cites · 11 sentences without a confident label
Uses the method or tool of 1 paper
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To that end, we closely follow a recent analysis of [ref] .
Quasi-Particle Theory of Shear and Bulk Viscosities of Hadronic Matter · Landau-Lifshitz condition and the bulk viscosity · 0.97
Uses data or values from 4 papers
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More precisely, inputs has been taken from the computations of $η$ and $ζ$ in quasi-particle models [ref] , and combine the understanding with a transport theory determination of them in the presence of chromo-Weibel instabilities [ref] .
Quasi-Particle Theory of Shear and Bulk Viscosities of Hadronic Matter · Introduction · 0.83
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Despite that there are a few first results computed from lattice QCD for bulk and shear viscosities [ref] which have observed a small value of $η/𝒮$, and large $ζ/𝒮$ at the RHIC.
Bulk viscosity and spectral functions in QCD · Introduction · 0.81
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Despite that there are a few first results computed from lattice QCD for bulk and shear viscosities [ref] which have observed a small value of $η/𝒮$, and large $ζ/𝒮$ at the RHIC.
The Bulk Channel in Thermal Gauge Theories · Introduction · 0.81
Cites as background 10 papers
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There have been several attempts so far to understand the hot QCD medium effects in terms of non-interacting/weakly interacting quasi-partons, viz., effective thermal mass models [ref] , effective mass model with temperature dependent bag parameter to cure the problem of thermodynamic inconsistency [ref] , effective quasi-particles with gluon condensate [ref] , Polyakov loop models [ref] (Polyakov loop acts as effective fugacity), and the quasi-partons with effective fugacities [ref] .
Hot QCD equations of state and response functions for quark-gluon plasma · The quasi-particle description of hot QCD · 1.00
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There have been computations of transport parameters in the case of pure gauge theory based on the effective mass models within the relaxation time approximation [ref] .
Shear and bulk viscosities of the gluon plasma in a quasiparticle description · Chromo-Weibel instability and the anomalous transport · 0.93
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In this context, there are other interesting studies in the literature [ref] .
Shear viscosity, cavitation and hydrodynamics at LHC · Introduction · 0.91
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