Partonic effects on higher-order anisotropic flows in relativistic heavy-ion collisions

Lie-Wen Chen, C. M. Ko, Zi-Wei Lin
2004 Physical Review C  
Higher-order anisotropic flows v_4 and v_6 in heavy ion collisions at the Relativistic Heavy Ion Collider are studied in a multiphase transport model that has previously been used successfully for describing the elliptic flow v_2 in these collisions. We find that the same parton scattering cross section of about 10 mb used in explaining the measured v_2 can also reproduce the recent data on v_4 and v_6 from Au + Au collisions at √(s)=200 AGeV. It is further found that the sensitive probe of the
more » ... sitive probe of the initial partonic dynamics in these collisions than v_2. Moreover, higher-order parton anisotropic flows are nonnegligible and satisfy the scaling relation v_n,q(p_T)∼ v_2,q^n/2(p_T), which leads naturally to the observed similar scaling relation among hadron anisotropic flows when the coalescence model is used to describe hadron production from the partonic matter.
doi:10.1103/physrevc.69.031901 fatcat:zr4p23l3djczddbzwl5l5kd6sq