The effect of shear and bulk viscosities on elliptic flow

In this work, we examine the effect of shear and bulk viscosities on elliptic flow by taking a realistic parameterization of the shear and bulk viscous coefficients, η and ζ, and their respective relaxation times, τπ and τΠ. We argue that the behaviors close to an ideal fluid observed at RHIC energies may be related to the non-trivial temperature dependence of these transport coefficients.

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