Abstract
We consider the problem of neutrino masses and mixing within the general framework of standard (type-I) seesaw models leading to three light neutrinos. Under the assumption of a hierarchical neutrino mass spectrum , consistent with present data, we examine possible lopsided patterns for the neutrino Yukawa couplings that can account for the observed mixing angles, including a small but nonvanishing . An embedding of the above within a general class of models is also considered.
- Received 22 February 2012
DOI:https://doi.org/10.1103/PhysRevD.85.073014
© 2012 American Physical Society