2022 Impact factor 4.4
Particles and Fields
Eur. Phys. J. C 27, 399-404 (2003)
DOI: 10.1140/epjc/s2002-01123-1

Lepton flavor violation in lopsided models and a neutrino mass model

X.-J. Bi

Department of Physics, Tsinghua University, Beijing 100084, P.R. China

(Received: 18 November 2002 / Published online: 14 February 2003 )

A widely adopted theoretical scheme to account for the neutrino oscillation phenomena is the see-saw mechanism together with the "lopsided" mass matrices, which is generally realized in the framework of supersymmetric grand unification. We will show that this scheme leads to large lepton flavor violation at low energy if supersymmetry is broken at the GUT or Planck scale. Especially, the branching ratio of $\mu\to e\gamma$ already exceeds the present experimental limit. We then propose a phenomenological model which can account for the LMA solution to the solar neutrino problem and at the same time predict a branching ratio of $\mu\to e\gamma$ below the present limit.

© Società Italiana di Fisica, Springer-Verlag 2003