2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/206313We have systematically estimated the possible temperatures obtained from an analysis of recent data on $p_t$ distributions observed at RHIC experiments. Using the fact that observed $p_t$ distributions cannot be described by the original Hagedorn formula in the whole range of transverse momenta (in particular above 6 GeV/c), we propose a modified Hagedorn formula including temperature fluctuation. We show that by using it we can fit $p_t$ distributions in the whole range and can estimate consistently the relevant temperatures, including their fluctuations.Some misprints corrected, references updated. To be published in Eur. Phys. J. C (2006)High Energy Physics - PhenomenologyNuclear Theorytext