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

Figure 1

Energy dependence of the main BEC parameters , obtained for 3D Gaussian analyses for collisions at midrapidity and low  GeV/. Errors for experimental points are statistical only. For strength of correlations (a) fit by specific case of (7) at is shown by solid line, and the dashed line corresponds to the fit by constant. For BEC radii (b–d) approximations by function (7) are shown by solid lines for case (i.1), and dashed lines present the results for linear logarithmic function in case (i.2).

(a)

(b)

(c)

(d)