Early anisotropic hydrodynamics and the RHIC early-thermalization and HBT puzzles

Abstract

We address the problem if the early thermalization and HBT puzzles in relativistic heavy-ion collisions may be solved by the assumption that the early dynamics of the produced matter is locally anisotropic. The hybrid model describing the purely transverse hydrodynamic evolution followed by the perfect-fluid hydrodynamic stage is constructed. The transition from the transverse to perfect-fluid hydrodynamics is described by the Landau matching conditions applied at a fixed proper time. The global fit to the RHIC data reproduces the soft hadronic observables (the pion, kaon, and the proton spectra, the pion and kaon elliptic flow, and the pion HBT radii) with the accuracy of about 20%. These results indicate that the assumption of the very fast thermalization may be relaxed. In addition, the presented model suggests that a large part of the inconsistencies between the theoretical and experimental HBT results may be removed.

replaced with the version published in Phys.Rev.C 82

References in corpus (12)

• Space-time evolution of bulk QCD matter
• Therminator: Thermal heavy-Ion generator
• Energy density of the Glasma
• 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
• Elliptic Flow from a Hybrid CGC, Full 3D Hydro and Hadronic Cascade Model
• Soft heavy-ion physics from hydrodynamics with statistical hadronization - predictions for the Large Hadron Collider
• Early evolution of transversally thermalized partons
• Characteristic form of boost-invariant and cylindrically non-symmetric hydrodynamic equations
• General formulation of transverse hydrodynamics

Cited by in corpus (8)

• Highly-anisotropic and strongly-dissipative hydrodynamics for early stages of relativistic heavy-ion collisions
• Highly-anisotropic hydrodynamics in 3+1 space-time dimensions
• Quarkonium dissociation by anisotropy
• Asymmetric 1+1-dimensional hydrodynamics in collision
• Basic phenomenology for relativistic heavy-ion collisions
• Light Probes in a Strongly Coupled Anisotropic Plasma
• Hydrodynamic attractors for the speed of sound in holographic Bjorken flow
• Holographic study on the jet quenching parameter in anisotropic systems