Super-Kamiokande atmospheric neutrinos: Status of subdominant oscillations

In the context of the recent (79.5 kTy) Super-Kamiokande atmospheric neutrino data, we concisely review the status of muonic-tauonic flavor oscillations and of the subdominant electron or sterile neutrino mixing, in schemes with three or four families and one dominant mass scale. In the three-family case, where we include the full CHOOZ spectral data, we also show, through a specific example, that “maximal” violations of the one-dominant mass scale approximation are not ruled out yet. PACS: 14.60.Pq, 13.15.+g, 95.85.Ry Typeset using REVTEX