Transverse energy per charged particle at relativistic energies from a statistical model with expansion

Abstract

Transverse energy and charged particle pseudorapidity densities at midrapidity and their ratio, $dE_{T}/dη\mid_{mid} / dN_{ch}/dη|_{mid}$, are evaluated in a statistical model with longitudinal and transverse flows for the wide range of colliders, from AGS to RHIC at $\sqrt{s_{NN}}=200$ GeV. Evaluations are done at freeze-out parameters established independently from fits to observed particle yields and $p_{T}$ spectra. Decays of hadron resonances are treated thoroughly and are included in derivations of $dE_{T}/dη|_{mid}$ and $dN_{ch}/dη|_{mid}$. The predictions of the model agree well with the experimental data. However, some (explicable) overestimation of the ratio has been observed.