Effect of temperature-dependent eta/s on flow anisotropies
Abstract
We investigate the effects of a temperature-dependent shear viscosity over entropy density ratio eta/s on the flow anisotropy coefficients v2 and v4 in ultrarelativistic heavy-ion collisions at RHIC and LHC. We find that v4 is more sensitive to the viscosity at low temperatures than v2. At RHIC v2 is mostly affected by the viscosity around the phase transition, but the larger the collision energy, the more the quark-gluon plasma viscosity affects v2.
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