DPG Phi
Verhandlungen
Verhandlungen
DPG

Freiburg 2008 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 18: Neutrinophysik (Theorie)

T 18.1: Vortrag

Freitag, 7. März 2008, 14:00–14:15, Peterhof-HS 4

Quark-Lepton Complementarity from Discrete Flavor Symmetries — •Florian Plentinger, Gerhart Seidl, and Walter Winter — Institut für Theoretische Physik und Astrophysik, Universität Würzburg, D-97074 Würzburg, Germany

We present numerous simple models for fermion masses realizing quark-lepton complementarity, i.e., the solar mixing angle θ12 obeys the sum-rule θ12C≈π/4, where θC is the Cabbibo angle. As flavor symmetries, we use products of cyclic groups. The fermion mass hierarchies are generated by higher-dimension operators via the Froggatt-Nielsen mechanism. Neutrino masses emerge exclusively from the usual type-I seesaw mechanism. We focus on solutions that can naturally give close to tri-bimaximal lepton mixing with a very small reactor angle θ13≪θC. Hierarchical fermion mass ratios and the mixing angles are predicted as powers of a single parameter of the order of θC. These models are rather general in the sense that large mixings can come from the charged leptons and/or neutrinos. Moreover, in the neutrino sector, both left- and right-handed neutrinos can mix maximally. This could be the result of quark-lepton unification in grand unified theories.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2008 > Freiburg