Time Dependence of Elliptic Flow in Ultrarelativistic Au+Au Collisions

FENG Qi-Chun; ZHANG Jing-Bo; HUO Lei; ZHANG Wei-Ning

Chinese Physics C> 2007, Vol. 31> Issue(8) : 736-740

Time Dependence of Elliptic Flow in Ultrarelativistic Au+Au Collisions

Department of Physics, Harbin Institute of Technology, Harbin 150001, China

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Abstract：
The freeze-out time dependence of the elliptic flow and the transverse radius r_T dependence of elliptic flow at different freeze-out time are studied for non-central Au+Au collisions at s_NN=200 GeV with the Relativistic Quantum Mocular Dynamics model. We get the results that the elliptic flow decreases with the freeze-out time and the correlation between the elliptic flow and the transverse radius changes with the freeze-out time what could be explained with the pressure gradient. The transverse expansion velocity of particles emitted at the freeze-out time is adopted as a signal of the pressure gradient.

References

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FENG Qi-Chun, ZHANG Jing-Bo, HUO Lei and ZHANG Wei-Ning. Time Dependence of Elliptic Flow in Ultrarelativistic Au+Au Collisions[J]. Chinese Physics C, 2007, 31(8): 736-740.

FENG Qi-Chun, ZHANG Jing-Bo, HUO Lei and ZHANG Wei-Ning. Time Dependence of Elliptic Flow in Ultrarelativistic Au+Au Collisions[J]. Chinese Physics C, 2007, 31(8): 736-740. shu

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Received: 2006-11-10
Revised: 2007-01-17

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沈阳化工大学材料科学与工程学院沈阳 110142

Time Dependence of Elliptic Flow in Ultrarelativistic Au+Au Collisions

Corresponding author: ZHANG Jing-Bo,

Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Received Date: 2006-11-10
Accepted Date: 2007-01-17
Available Online: 2007-08-05

Abstract: The freeze-out time dependence of the elliptic flow and the transverse radius r_T dependence of elliptic flow at different freeze-out time are studied for non-central Au+Au collisions at s_NN=200 GeV with the Relativistic Quantum Mocular Dynamics model. We get the results that the elliptic flow decreases with the freeze-out time and the correlation between the elliptic flow and the transverse radius changes with the freeze-out time what could be explained with the pressure gradient. The transverse expansion velocity of particles emitted at the freeze-out time is adopted as a signal of the pressure gradient.