Freeze-Out Parameters in Heavy-Ion Collisions at AGS, SPS, RHIC, and LHC Energies

Figure 3

Dependence on the Choice of Particles Whose Yields Are Used as Input to Extract the Thermal Parameters. Comparative study of the thermal parameters (a) , (b) (, , and ), and (c) radius, plotted versus collision energy, extracted within GCE with 1CFO as the freeze-out scheme for the two cases: (i) , , , , , , , , , and were available, and (ii) all available particles at all energies as tabulated in Tables 1, 2, 3, and 4. Here, , fixed from (2) and fixed from (1). The fitted parameters are broadly insensitive to the choice of particles. However, at the AGS energies, because of the unavailability of data of the strange baryons, the extracted values of and come out to be much lower than expected from the trend at the SPS and higher energies.

(a)

(b)

(c)