TWO-COMPONENT STATISTICAL MODEL OF A NUCLEAR FIREBALL IN THE COOLING STAGE (FREEZEOUT)

The saddle point method is applied to the statistical integral of Grand Canonical Ensemble for cases one-component and two-component van der Waals gas. This made it possible obtain state equation corrections pressure density final system. These contributions, taking into account realistic effective potential, make take finite dimensions system and, as expected, can be used, in particular, case a nuclear fireball that occurs high-energy nucleus-nucleus collisions. depending on size were compared with corresponding fluctuations. become insignificant at thermodynamic boundary, where, according physics, difference between observed quantities obtained different ensembles disappears. Taking modern estimates sizes mesons nucleons, well potentials their interactions, formulas transparent nonrelativistic constraint are obtained. It expected they used analyze experimental data quantitative characteristics yield particles various types from stages freezeout determine critical parameters