2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42152The ratio ${dE_{T} \over {dη}} / {dN_{ch} \over {dη}}$ is analyzed in the framework of a single-freeze-out thermal hadron gas model. Decays of hadron resonances are taken into account in evaluations of this ratio. The predictions of the model at the freeze-out parameters, established previously from observed particle yields, agree very well with the ratio measured at RHIC, SPS and AGS.Revtex, 1 figure (included), 6 pages, the description of AGS and SPS cases has been corrected, to appear in Acta Phys.Polon.BHigh Energy Physics - Phenomenologytext