2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201610We investigate rapidity dependence of the ratio of photon and pion production cross sections in high energy proton (deuteron) - nucleus collisions at RHIC and LHC. This ratio, and its rapidity dependence can be a sensitive probe of high density QCD (Color Glass Condensate) dynamics and shed further light on the role of saturation physics at RHIC and LHC.8 pages, 3 figuresNuclear Theorytext