2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48874The radiative decay of muon-neutrinos in matter with a scheme of mass-degenerate neutrinos could be the common origin of the appearance of anti-electron-neutrinos at LSND and the disappearance of muons-neutrinos at SuperKamiokande. With the decay probability fixed by the LSND signal, the deficit of atmospheric neutrinos can be satisfactorily reproduced.4 pages, 0 figureHigh Energy Physics - Phenomenologytext