1997/02/28 by Christopher D. Carone, Lawrence J. Hall · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Flavor #Geometry #Lepton #Mixing (physics) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Quark #Standard Model (mathematical formulation) #Sterile neutrino #Supersymmetry #Symmetry (geometry) #Yield (engineering) #hep-ph
paper · pdf · doi:10.1103/physrevd.56.4198
published as Phys.Rev.D56:4198-4206,1997 · 23 pp. LaTeX
arxiv created 1997/02/28 · openalex publication_date 1997/10/01 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the neutrino physics of models with a sequentially broken U(2) flavor symmetry. Such theories yield the observed pattern of quark and lepton masses, while maintaining sufficient degeneracies between superparticles of the first two generations to solve the supersymmetric flavor problem. Neutrino mass ratios and mixing angles in these models may differ significantly from those of the charged leptons, even though the neutrinos and charged leptons transform identically under the flavor group. A wide class of well-motivated U(2) theories yield order one \ensuremathν_\ensuremathμ-\ensuremathν_\ensuremathτ mixing, without a fine-tuning of parameters. These models provide a natural solution to the atmospheric neutrino deficit, and also have distinctive signatures at long-baseline neutrino oscillation experiments.