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Analysis of elliptic flow of protons and antiprotons in Au+Au collisions isperformed in a wide range of incident energies $\sqrt{s_{NN}}$ = 7.7--62.4 GeV.Simulations has been done within the three-fluid model employing a purelyhadronic equation of state (EoS) and two versions of the EoS involvingdeconfinement transition: an EoS with the first-order phase transition and thatwith a smooth crossover transition. It is found that the proton data arereproduced approximately to the same extent within all of the scenarios,including the hadronic one, while the deconfinement scenarios look certainlypreferable for the antiproton elliptic flow. The fact that difference betweenelliptic flows of protons and antiprotons decreases with the incident energyrise is a consequence of reducing baryon stopping rather than an onset ofdeconfinement.

Elliptic Flow of Protons and Antiprotons in Au+Au Collisions at $\sqrt{s_{NN}}$ = 7.7--62.4 GeV within Alternative Scenarios of Three-Fluid Dynamics