Connecting bimaximal neutrino mixing to a light sterile neutrino - art. no. 091301

Authors
Citation
Rn. Mohapatra, Connecting bimaximal neutrino mixing to a light sterile neutrino - art. no. 091301, PHYS REV D, 6409(9), 2001, pp. 1301
Citations number
67
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6409
Issue
9
Year of publication
2001
Database
ISI
SICI code
0556-2821(20011101)6409:9<1301:CBNMTA>2.0.ZU;2-I
Abstract
It is shown that if small neutrino masses owe their origin to the conventio nal seesaw mechanism and the Maki-Nakagawa-Sakata (MNS) mixing matrix is in the exact bimaximal form, then there exist symmetries in the theory that a llow one of the right-handed neutrinos to become naturally massless, making it a candidate for the sterile neutrino discussed in the literature. Depar tures from the exact bimaximal limit lead to a tiny mass for the sterile ne utrino as well as its mixing to the active neutrinos. This provides a minim al theoretical framework where a simultaneous explanation of the solar, atm ospheric, and Liquid Scintillation Neutrino Detector (LSND) observations wi thin the so-called 3+1 scenario may be possible.