2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48975In order to fix the parameters for predictions of hard photon and pion production in $Au+Au$ collisions at $\sqrt{s}=200$ GeV, proton-proton and proton-nucleus data are analyzed in perturbative QCD in the energy range $\sqrt{s} \approx 20-60$ GeV and a prediction at RHIC energy is given.5 pages with 4 eps figures included. Proceeding of the APS Atlanta meetingHigh Energy Physics - PhenomenologyNuclear Theorytext