Collision energy dependence
Collision energy dependence (F ≡ (√sNN - 2 mN)3/4/√sNN1/4 ≅ sNN1/4, where mN is the nucleon mass) of various hadron production properties (see text for details) measured in central Pb+Pb and Au+Au collisions (solid symbols), compared with results from p+p reactions (open dots). The changes in the SPS energy range (solid squares) suggest the onset of the deconfinement phase transition.