2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44767The cosmological and astrophysical implications of a shadow matter model which could also have interesting experimental consequences are examined. The model has identical microphysics for both the ordinary and shadow worlds but requires a macroscopic asymmetry from nucleosynthesis constraints. It is proposed that this macroscopic asymmetry can be generated at the quark-hadron phase transition.11 pages (LaTeX), PURD-TH-93-04High Energy Physics - Phenomenologytext