Year: 2012
Type: article
Abstract: A recently formulated model of highly-anisotropic and strongly dissipative hydrodynamics is used in $3+1$ dimensions to study behavior of matter produced in ultrarelativistic heavy-ion collisions. We search for possible effects of the initial high anisotropy of pressure on the final soft-hadronic observables. We find that, by appropriate adjustment of the initial energy density and/or the initial pseudorapidity distributions, the effects of the initial anisotropy of pressure may be easily compensated, and the final hadronic observables become insensitive to early dynamics. Our results indicate that the early thermalization assumption is not necessary to describe hadronic data, in particular, to reproduce the measured elliptic flow ${v}_{2}$. The complete thermalization of matter (local equilibration) may take place only at times of about 1--2 fm/$c$, in agreement with the results of microscopic models.
Source: Physical Review C
Authors: Radoslaw Ryblewski, Wojciech Florkowski
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2010018351