Dynamical interpretation of chemical freeze-out in heavy ion collisions
V. D. Toneev, J. Cleymans, E. G. Nikonov, K. Redlich, A. A. Shanenko
Abstract
It is demonstrated that there exists a direct correlation between chemical freeze-out point and the softest point of the equation of state where the pressure divided by the energy density, p(\epsilon)/\epsilon, has a minimum. A dynamical model is given as an example where the passage of the softest point coincides with the condition for chemical freeze-out, namely an average energy per hadron \approx 1 GeV. The sensitivity of the result to the equation of state used is discussed.