Transverse hydrodynamics with sudden hadronization -- production of strangeness

Abstract

We consider a physical scenario for ultra-relativistic heavy-ion collisions where, at the early stage, only transverse degrees of freedom of partons are thermalized, while the longitudinal motion is described by free streaming. When the energy density of the partonic system drops to a certain critical value, the partons hadronize and the newly formed hadronic system freezes out. This sudden change is described with the help of the Landau matching conditions followed by the simulations done with THERMINATOR. The proposed scenario reproduces well the transverse-momentum spectra, the elliptic flow coefficient v2, and the HBT radii of pions and kaons studied at RHIC (Au+Au collisions at the top beam energy). It also reproduces quite well the transverse-momentum spectra of hyperons.

talk presented by WF at the Strangeness in Quark Matter Conference, Buzios, Brazil, Sept. 27 - oct. 2, 2009

References in corpus (11)

• Pion interferometry in Au+Au collisions at $\sqrt{{\mathrm{s}}_{{}_{\mathrm{NN}}}}$ = 200 GeV
• Therminator: Thermal heavy-Ion generator
• Collision geometry scaling of Au+Au pseudorapidity density from sqrt(s_NN) = 19.6 to 200 GeV
• Initial condition for hydrodynamics, partonic free streaming, and the uniform description of soft observables at RHIC
• Free-streaming approximation in early dynamics of relativistic heavy-ion collisions
• Femtoscopy in hydro-inspired models with resonances
• Rapid hydrodynamic expansion in relativistic heavy-ion collisions
• Can Thermalization in Heavy Ion Collisions be Described by QCD Diagrams?
• Early evolution of transversally thermalized partons
• General formulation of transverse hydrodynamics
• Isotropization and Thermalization in Heavy Ion Collisions

Cited by in corpus (3)

• THERMINATOR 2: THERMal heavy IoN generATOR 2
• Asymmetric 1+1-dimensional hydrodynamics in collision
• Early anisotropic hydrodynamics and the RHIC early-thermalization and HBT puzzles