In view of the recent announcement on nonzero neutrino mass from Super-Kamiokande experiment, it would be very timely to investigate all the possible scenarios on masses and mixings of light neutrinos. Recently suggested mass matrix texture for the quark CKM mixing, which can be originated from the family permutation symmetry and its suitable breakings, is assumed for the neutrino mass matrix and determined by the four combinations of solar, atmospheric and LSND neutrino data and cosmological hot dark matter bound as input constraints. The charged-lepton mass matrix is assumed to be diagonal so that the neutrino mixing matrix can be identified directly as the lepton flavor mixing matrix and no CP invariance violation originates from the leptonic sector. The results favor hierarchical patterns for the neutrino masses, which follow from the case when the solar-atmospheric data is used.
Bibliographical noteFunding Information:
Two of us (K.K. and C.S.K.) wish to thank the Korea Institute for Advanced Study for warm hospitality. The work of K.K. was supported in part by the US DOE contract DE-FG02-91ER-40688-Task A. The work of C.S.K. was supported in part by CHEP-SRC Program and Grant No. 20015-111-02-2, R03-2001-00010 of the KOSEF, in part by BK21 Program and Grant No. 2001-042-D00022 of the KRF, and in part by Yonsei Research Fund, Project No. 2001-1-0057.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Astronomy and Astrophysics
- Physics and Astronomy(all)