NUKLEONIKA 2006, 51(Suppl. 3):s21-s27

EFFECT OF HADRONIC RESCATTERING ON THE ELLIPTIC FLOW AFTER THE HYDRODYNAMICS MODEL

Guo-Liang Ma1, Yu-Gang Ma1,2, Ben-Hao Sa3, Xiang-Zhou Cai1, Ze-Jun He1,2, Huang-Zhong Huang4, Jia-Li Long1, Wen-Qin Shen1,2, Chen Zhong1, Jin-Hui Chen1, Jia-Xu Zuo1, Song Zhang1, Xing-Hua Shi1

1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P. O. Box 800-204, Shanghai 201 800, China
2 China Center of Advanced Sciences and Technology (World Laboratory), P. O. Box 8730, Beijing 100 080, China
3 China Institute of Atomic Energy, P. O. Box 918, Beijing 102 413, China
4 University of California, Los Angeles, CA 90095, USA

A hydrodynamics + hadronic rescattering model is used to simulate Au+Au collisions at 200 GeV and a Cooper-Frye method is adopted for hadronization. The effect of hadronic rescattering on elliptic flow V2 in 20-40% Au+Au collisions at 200 GeV has been investigated. It is found that the hadronic rescattering can suppress elliptic flow V2 and makes an asymmetric system in momentum space tend to be less anisotropic. The suppression effect becomes weak with increasing transverse momentum. In addition, the effect of hadronic rescattering on transverse momentum spectra and anisotropy of hadronic coordinate space is presented.