Multi-particle azimuthal correlations and elliptic flow fluctuations in 2A GeV Au+Au collisions

Multi-particle azimuthal correlations between different anisotropic flow and elliptic flow fluctuations are investigated in 2A GeV Au+Au collisions within the RQMD model. The results show that the difference of elliptic flow in different events are developed in the early stage of reactions, and there exist strong space-momentum correlations for nucleons during the collective expansion of system. The fluctuations in the initial collision geometry and dynamical evolution of heavy ion collisions are not negligible.