2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105858I review some aspects related with the connections between neutrino physics and the thermal leptogenesis mechanism for the generation of the cosmological baryon asymmetry of the Universe. A special attention is devoted to the problem of establishing a bridge between leptonic CP violation at low and high energies.15 pages, 3 figures. Contribution to the proceedings of the "Symposium in Honour of Gustavo C. Branco: CP Violation and the Flavour Puzzle", Lisbon, Portugal, 19-20 July 2005High Energy Physics - Phenomenologytext