Energy-Dependent Chemical Potentials of Light Hadrons and Quarks Based on Transverse Momentum Spectra and Yield Ratios of Negative to Positive Particles

Figure 5

Transverse mass spectra for , , , and in central Pb-Pb collisions at (a, d) 6.3, (b, e) 7.7, and (c, f) 8.8 GeV. The symbols represent the experimental data taken by the NA49 Collaboration [43–45]. The errors are statistical only. The curves are fits of two-component Erlang function to the spectra.