2011/03/07 by Radoslaw Ryblewski, Radosław Ryblewski, Wojciech Florkowski
Engineering · Mathematics · Physics and Astronomy · #Anisotropy #Classical mechanics #Computational Fluid Dynamics and Aerodynamics #Dissipative system #Engineering #Gas Dynamics and Kinetic Theory #High-Energy Particle Collisions Research #Mechanics #Optics #Physics #Statistical physics #Structural engineering #Thermodynamics #Transverse plane #nucl-th
paper · pdf · doi:10.1140/epjc/s10052-011-1761-8
arxiv created 2011/03/07 · openalex publication_date 2011/11/01 · arxiv updated 2015/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A recently formulated framework of highly-anisotropic and strongly-dissipative hydrodynamics (ADHYDRO) is used to describe the evolution of matter created in ultra-relativistic heavy-ion collisions. New developments of the model contain: the inclusion of asymmetric transverse expansion (combined with the longitudinal boost-invariant flow) and comparisons of the model results with the RHIC data, which have become possible after coupling of ADHYDRO with THERMINATOR. Various soft-hadronic observables (the transverse-momentum spectra, the elliptic flow coefficient v2, and the HBT radii) are calculated for different initial conditions characterized by the value of the initial pressure asymmetry. We find that as long as the initial energy density profile is unchanged the calculated observables remain practically the same. This result indicates the insensitivity of the analyzed observables to the initial anisotropy of pressure and suggests that the complete thermalization of the system may be delayed to easily acceptable times of about 1 fm/c.