Geometry and Space-Time Extent of Pion Emission Region at FCC Energies

Figure 6

Energy dependence of estimations for charged particle density and for critical one in A + A collisions. Points are calculated with help of the hybrid function for [19] and the experimental estimations for and uncertainties for points are propagated from statistical errors of measurements and fits used. Solid line corresponds to the hybrid approximation of [17] and dashed line is for parametrization of total charged multiplicity from [19]. Critical charged particle density is shown by dotted line with its statistical uncertainty levels represented by thin dotted lines. The heavy grey lines correspond to the systematic s.d. of calculated by varying of on .