DOI: 10.1140/epjc/s2002-01105-3
LMA solution to the solar neutrino problem and a phenomenological charged lepton mass matrix
X.-J. Bi1 and Y.-B. Dai21 Department of Physics, Tsinghua University, Beijing 100084, P.R. China
2 Institute of Theoretical Physics, Academia Sinica, P.O. Box 2735, Beijing 100080, P.R. China
(Received: 3 October 2002 / Revised version: 10 November 2002 / Published online: 24 January 2003 )
Abstract
We propose a phenomenological form of the charged lepton mass
matrix which extends the idea of a
"lopsided" mass matrix found in
the
literature. The features of the form are that both the 2-3 and
1-3
elements of the charged lepton mass matrix are of order 1 and
that
the small elements have a new structure. This form leads to
the interesting result that both large atmospheric and solar neutrino
mixing can be accounted for by the matrix.
Another
interesting result of this mass matrix is that it leads to very
small 1-3 mixing in the lepton sector and can suppress the
branching ratio of
under the present experimental
limit in the supersymmetric see-saw case.
© Società Italiana di Fisica, Springer-Verlag 2003
