6533b850fe1ef96bd12a8504
RESEARCH PRODUCT
Influence of temperature-dependent shear viscosity on elliptic flow at backward and forward rapidities in ultrarelativistic heavy-ion collisions
Pasi HuovinenPasi HuovinenEtele MolnárHarri NiemiHarri NiemiH. Holopainensubject
Nuclear and High Energy PhysicsParticle physicsNuclear TheoryHadronFOS: Physical sciences01 natural sciencesNuclear physicsNuclear Theory (nucl-th)Physics::Fluid DynamicsHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesRapiditySensitivity (control systems)Nuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear ExperimentPhysicsta114010308 nuclear & particles physicsEquation of state (cosmology)Elliptic flowHigh Energy Physics - PhenomenologyQuark–gluon plasmaHigh Energy Physics::ExperimentRelativistic Heavy Ion ColliderEnergy (signal processing)description
We explore the influence of a temperature-dependent shear viscosity over entropy density ratio $\eta/s$ on the azimuthal anisotropies v_2 and v_4 of hadrons at various rapidities. We find that in Au+Au collisions at full RHIC energy, $\sqrt{s_{NN}}=200$ GeV, the flow anisotropies are dominated by hadronic viscosity at all rapidities, whereas in Pb+Pb collisions at the LHC energy, $\sqrt{s_{NN}}=2760$ GeV, the flow coefficients are affected by the viscosity both in the plasma and hadronic phases at midrapidity, but the further away from midrapidity, the more dominant the hadronic viscosity is. We find that the centrality and rapidity dependence of the elliptic and quadrangular flows can help to distinguish different parametrizations of $(\eta/s)(T)$. We also find that at midrapidity the flow harmonics are almost independent of the decoupling criterion, but show some sensitivity to the criterion at back- and forward rapidities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-07-30 | Physical review C |