Speaker
Description
Results of simulations of directed flow of various hadrons in Au+Au collisions at collision energies $\sqrt{s_{NN}}=$ 3--4.5 GeV are presented. Simulations are performed within the model three-fluid dynamics and the event simulator based on it (THESEUS). The results are compared with available data. The directed flows of various particles provide information on dynamics in various parts and at various stages of the colliding system. However, the information on the equation of state is not always directly accessible because of strong influence of the afterburner stage or insufficient equilibration of the matter. It is found that the crossover scenario gives the best overall description of the data. The transition into QGP in Au+Au collisions occurs at collision energies between 3 and 4.5 GeV, at baryon densities $n_B \geq 4 n_0$ and temperatures $\approx 150$ MeV.
