In the presented paper curves of constant $\epsilon_{ T} / n_{ charged}$ are calculated in $T-\mu_{ B}$ plane, in the framework of a single-freeze-out thermal hadron gas model. The ratio is a theoretical equivalent of ${ { dE_{ T}} \over { d\eta}}_{ \mid \eta=0} / { { dN_{ ch}} \over { d\eta}}_{ \mid \eta=0}$ measured at RHIC and SPS. In both $\epsilon_{ T}$ and $n_{ charged}$ decays of hadron resonances are taken into account. The freeze-out temperature $T_{ f.o.}=156_{ -11}^{ +14}$ MeV is obtained for RHIC, whereas $T_{ f.o.}=134-140$ MeV is evaluated for SPS.
Categories: hep-ph