2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5351We explore quantitatively the conditions in which matter (protons, neutrons) formed in the Early Universe during a period which spanned 10--50mus. We obtain all chemical potentials implied by the present day baryon-to-photon ratio. The baryochemical potential reaches its minimal value at the beginning of hadronization of the quark Universe, where mu_b=1.1 \pm 0.25 eV. In the mixed hadron-quark phase, a significant hadron sector electric charge distillation is found.4 pages including 4 figures; PRL under review; results updated to include WMAP results, entropy counting improvedAstrophysicsHigh Energy Physics - PhenomenologyNuclear Theorytext