Are antibaryons a signal for a phase transition in ultrarelativistic nucleus-nucleus collisions?

In this paper, it is speculated that antibaryon production in relativistic nucleus-nucleus collisions is a signal for a phase transition from a high-temperature Debye-screened and chirally symmetric phase to a low-temperature confined and chirally broken phase. In a chiral model for the transition where baryons are topological excitations the production of baryons and antibaryons takes place by the Kibble mechanism. A qualitative discussion of possible experimental signatures is given.