Beam energy dependence of the squeeze-out effect on the directed and elliptic flow in Au + Au collisions in the high baryon density region

We present a detailed analysis of the beam energy dependence of the mechanisms for generation of directed and elliptic flows in Au+Au collisions focusing on the role of hadronic rescattering and spectator shadowing within a microscopic transport model JAM with different equation of state. A systematic study of the beam energy dependence is performed for Au+Au collisions at $2 \leq \sqrt{s_{NN}}\leq 62.4$ GeV. Transition of the dynamical origin of directed flow is observed. We found that initial Galuber type nucleon-nucleon collisions generate negative $v_1$ for nucleons at mid-rapidity due to the presence of spectator matter, and this negative nucleon $v_1$ is turned to be positive by the meson-baryon interactions at the beam energy region of $\sqrt{s_{NN}} 0.5$, which decreases as beam energy increases.