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We argue that the chemical freeze-out in heavy ion collisions at high baryondensity is not associated to a phase transition or rapid crossover. We employthe linear nucleon-meson model with parameters fixed by the zero-temperatureproperties of nuclear matter close to the liquid-gas quantum phase transition.For the parameter region of interest this yields a reliable picture of thethermodynamic and chiral properties at non-zero temperature. The chemicalfreeze-out observed in low-energy experiments occurs when baryon densities fallbelow a critical value of about 15 percent of nuclear density. This region inthe phase diagram is far away from any phase transition or rapid crossover.

Chemical freeze-out in heavy ion collisions at large baryon densities