Effect of bulk viscosity on interferometry correlations in ultrarelativistic heavy-ion collisions

作     者：Piotr Bożek 

作者机构：AGH University of Science and Technology Faculty of Physics and Applied Computer Science Aleja Adama Mickiewicza 30 30-059 Krakow Poland 

出 版 物：《Physical Review C》 (物理学评论C辑：核物理学)

年 卷 期：2017年第95卷第5期

页      面：054909-054909页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Polish Ministry of Science and Higher Education (MNiSW) National Science Centre [DEC-2012/06/A/ST2/00390] PL-Grid Infrastructure 

主　　题：Collective flow Particle correlations & fluctuations Relativistic heavy-ion collisions 

摘      要：A temperature-dependent bulk viscosity coefficient is used in 3+1-dimensional hydrodynamic simulations. I study the effect of the increase of bulk viscosity around the critical temperature on the system dynamics in central Pb+Pb collisions at sNN=2760 GeV. With increasing bulk viscosity the lifetime of the system increases slightly. Also the shape of the freeze-out hypersurface changes; the outer layers of the fireball live longer. This effect causes a small reduction of the ratio of two interferometry radii, Rout/Rside, improving the agreement with experimental data.