2001/01/31 by Qaisar Shafi, Shafi, Qaisar, Zurab Tavartkiladze +1
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0101350
To appear in the proceedings of Nato Advanced Study Institute, held in Cascais, Portugal, June 26-July 7, 2000
arxiv created 2001/02/11 · arxiv updated 2009/11/30
We describe how bi-maximal neutrino mixing can be realized in realistic models based on MSSM and SUSY GUTs such as SU(5) and SO(10). A crucial role is played by an anomalous \cal U(1) flavor symmetry, which also helps understand the observed charged fermion mass hierarchies and the magnitudes of the CKM matrix elements. While in MSSM a variety of solutions for the solar neutrino puzzle are possible, SUSY SU(5) and SO(10) only permit the large mixing angle MSW solution. Models in which the \cal U(1) symmetry also mediates SUSY breaking allow both the large mixing angle and the low MSW solutions. We also present renormalization group studies for the neutrino mass matrix, generated through the \cal U(1) flavor symmetry. Our analysis shows that renormalization does not change the desirable picture of bi-maximal mixing.