Conformal relativistic viscous hydrodynamics: Applications to RHIC results at s NN =200 GeV

By M. Luzum, Paul Romatschke. 2008

586 citations recorded by the source corpus.

A new set of equations for relativistic viscous hydrodynamics that captures both weak-coupling and strong-coupling physics to second order in gradients has been developed recently. We apply this framework to bulk physics at the Relativistic Heavy Ion Collider (RHIC), both for standard (Glauber-type) as well as for color-glass-condensate (CGC) initial conditions and show that the results do not depend strongly on the values for the second-order transport coefficients. Results for multiplicity, radial flow and elliptic flow are presented, and we quote the ratio of viscosity over entropy density for which our hydrodynamic model is consistent with experimental data. For CGC initial conditions, early thermalization does not seem to be required in order for hydrodynamics to describe charged hadron elliptic flow.

View Paper: https://www.semanticscholar.org/paper/eec67fadb6523ff9dc4f4bff2cf24ba2538d36e4

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Citations in the corpus

Stickiness of sound: An absolute lower limit on viscosity and the breakdown of second-order relativistic hydrodynamics (2011, background): “16 may be on the high side in terms of fitting elliptic flow data [10].”
Thermal transport and drag force in improved holographic QCD (2009, background): “This leads to the identification: sihqcd(T (s) ihqcd) = 14.9(TQGP) 3 (4.37) The temperature translation table between the various schemes is shown in table 1.”
Improved holographic Yang–Mills at finite temperature: Comparison with data (2009, result): “Relativistic hydrodynamics describes very well the QGP [2], with a shear-viscosity to entropy density ratio close to that of N = 4 SYM, [3].”
Relativistic Fluid Dynamics in and out of Equilibrium (2017, methodology): “[302], the naive discretization discussed above leads to stable evolution for sufficiently small δτ as long as the real viscosity coefficient is non-vanishing.”
Improved Holographic QCD (2010, background): “Moreover, although the shear viscosity from N = 4 seems to be close to that “measured” by experiment, lattice data indicate that in the relevant RHIC range 1 ≤ TTc ≤ 3 the QGP seems not to be a fully conformal fluid.”
Transport in inhomogeneous quantum critical fluids and in the Dirac fluid in graphene (2015, methodology): “5~/kB have been reported in other experiments in cold atomic gases [67] and quark-gluon plasma [68].”