Predictions on some possible phase transitions in Au-Au nuclear central collisions in CBM experiment at FAIR-GSI

摘要

In this work, we present numerical calculations for the excitation function of the antiparticle to particle ratio for the 6-25 A GeV energy interval, which have a predictive character for the CBM experiment at FAIR-GSI. For two energy intervals, plateau shapes are observed, in contrast to the general tendency of the antiparticle to particle ratio growth with energy increase, which may suggest the emergence of the mixed phase for a fraction of time. The results of our calculations are in good agreement with the results from other papers based on experimental data (AGS, HADES). In the analysis of the systematic dependence of K~(-)/K~(+)on the p/p ratios, quasi-coincidences or "points returns" for two, three consecutive energies appear, which may suggest possible phase transitions in the newly formed nuclear matter in relativistic heavy ion collisions.