Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-06-07
Phys.Lett. B544 (2002) 1-10
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 10 figures; references and a subsection containing an example with odd CP parities added; results and conclusions un
Scientific paper
10.1016/S0370-2693(02)02470-X
We show that in see-saw models with bimaximal lepton mixing at the GUT scale and with zero CP phases, the solar mixing angle theta_{12} generically evolves towards sizably smaller values due to Renormalization Group effects, whereas the evolution of theta_{13} and theta_{23} is comparatively small. The currently favored LMA solution of the solar neutrino problem can thus be obtained in a natural way from bimaximal mixing at the GUT scale. We present numerical examples for the evolution of the leptonic mixing angles in the Standard Model and the MSSM, in which the current best-fit values of the LMA mixing angles are produced. These include a case where the mass eigenstates corresponding to the solar mass squared difference have opposite CP parity.
Antusch Stefan
Kersten Joern
Lindner Manfred
Ratz Michael
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