Influence of a temperature-dependent shear viscosity on the azimuthal asymmetries of transverse momentum spectra in ultrarelativistic heavy-ion collisions

Understand

We study the influence of a temperature-dependent shear viscosity over entropy density ratio $\eta/s$, different shear relaxation times $\tau_\pi$, as well as different initial conditions on the transverse momentum spectra of charged hadrons and identified particles.

• We investigate the azimuthal flow asymmetries as a function of both collision energy and centrality.
• The elliptic flow coefficient turns out to be dominated by the hadronic viscosity at RHIC energies.
• Only at higher collision energies the impact of the viscosity in the QGP phase is visible in the flow asymmetries.