Importance of the Bulk Viscosity of QCD in Ultrarelativistic Heavy-Ion Collisions.

@article{Ryu2015ImportanceOT,
  title={Importance of the Bulk Viscosity of QCD in Ultrarelativistic Heavy-Ion Collisions.},
  author={Sung Ju Ryu and Jean-François Paquet and C. P. Shen and Gabriel S. Denicol and Bjoern Schenke and Sangyong Jeon and Charles Gale},
  journal={Physical review letters},
  year={2015},
  volume={115 13},
  pages={
          132301
        }
}
We investigate the consequences of a nonzero bulk viscosity coefficient on the transverse momentum spectra, azimuthal momentum anisotropy, and multiplicity of charged hadrons produced in heavy ion collisions at LHC energies. The agreement between a realistic 3D hybrid simulation and the experimentally measured data considerably improves with the addition of a bulk viscosity coefficient for strongly interacting matter. This paves the way for an eventual quantitative determination of several QCD… 

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References

SHOWING 1-10 OF 104 REFERENCES

Interplay of shear and bulk viscosity in generating flow in heavy-ion collisions

We perform viscous hydrodynamic calculations in 2+1 dimensions to investigate the influence of bulk viscosity on the viscous suppression of elliptic flow in noncentral heavy-ion collisions at

Dynamics of hot bulk QCD matter: From the quark-gluon plasma to hadronic freeze-out

We introduce a combined macroscopic-microscopic transport approach employing relativistic hydrodynamics for the early, dense, deconfined stage of the reaction and a microscopic nonequilibrium model

Transport coefficients of hadronic matter near Tc.

A hadron resonance gas model including all known particles and resonances with masses m < 2 GeV and an exponentially rising density of Hagedorn states for m > 2 GeV is used to obtain an upper bound

Bulk viscosity, particle spectra and flow in heavy-ion collisions

We study the effects of bulk viscosity on pT spectra and elliptic flow in heavy ion collisions. For this purpose we compute the dissipative correction δf to the single particle distribution functions

HYDRODYNAMIC MODELING OF HEAVY-ION COLLISIONS

We review progress in the hydrodynamic description of heavy-ion collisions, focusing on recent developments in modeling the fluctuating initial state and event-by-event viscous hydrodynamic

Viscosity information from relativistic nuclear collisions: how perfect is the fluid observed at RHIC?

Relativistic viscous hydrodynamic fits to Brookhaven Rel ativistic Heavy Ion Collider data on the centrality dependence of multiplicity, transverse, and elliptic flow for square root s = 200 GeV Au+Au collisions seem to favor a much smaller viscosity over entropy ratio, below the bound from the anti-de Sitter conformal field theory conjecture.

RELATIVISTIC HADRON-HADRON COLLISIONS IN THE ULTRA-RELATIVISTIC QUANTUM MOLECULAR DYNAMICS MODEL

Hadron-hadron (h-h) collisions at high energies are investigated in the ultra-relativistic quantum molecular dynamics (UrQMD) approach. This microscopic transport model describes the phenomenology of

Effects of Bulk Viscosity at Freezeout

We investigate particle spectra and elliptic flow coefficients in relativistic heavy-ion collisions by taking into account the distortion of phase space distributions by bulk viscosity at freezeout.
...