2002/03/05 by Ming-Yang Cheng, Cheng, Ming-Yang, Kingman Cheung +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0203051
11 pages, references are added
arxiv created 2002/04/02 · arxiv updated 2009/11/30
The original Zee model can easily accommodate a bi-maximal mixing solution for the atmospheric and solar neutrino problems. From the most recent fit to the data we obtain a set of parameters for the Zee model. However, the recent claim on a positive signal observed in a neutrinoless double beta decay, which requires a nonzero mee, cannot be accounted for by the Zee model. Based on the observed neutrino mass-square differences and mixings, we derive a few general patterns for the neutrino mass matrix in the flavor basis, which can correctly describe the atmospheric, solar, and 0νββ data. Finally, we investigate a few possible extensions to the Zee model, which can give the required mass patterns.