2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197139We point out that the dependence on the order of the matter through which neutrinos pass can provide a window into CP violation in the neutrino sector. This allows for study of CP in the neutrino sector without the necessity of making a comparison between the behavior of neutrinos and that of antineutrinos.10 pp, including three figures; added references, fixed typosHigh Energy Physics - Phenomenologytext