Possible LSND effect as a small perturbation of the bimaximal texture for three active neutrinos

2001/01/02 by Wojciech Krolikowski
Physics and Astronomy · #hep-ph

paper · pdf

published as Acta Phys.Polon. B32 (2001) 1245-1252 · 9 pages, no figures

arxiv created 2001/01/02 · arxiv updated 2009/11/30

Abstract

A particular form of mixing matrix for three active and one sterile neutrinos is proposed. Its 3× 3 part describing three active neutrinos arises from the popular bimaximal mixing matrix that works satisfactorily in solar and atmospheric experiments if the LSND effect is ignored. Then, the sterile neutrino, effective in the fourth row and fourth column of the proposed mixing matrix, is responsible for the possible LSND effect by inducing one extra neutrino mass state to exist actively. The LSND effect, if it exists, turns out to reveal its \it perturbative nature related to small mixing of three active neutrinos with their sterile partner.

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