Bonn 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 22: Neutrinophysik (Theorie) II
T 22.4: Vortrag
Dienstag, 16. März 2010, 17:30–17:45, HG XV
Radiative Transmission of Lepton Flavor Hierarchies — •Adisorn Adulpravitchai1, Manfred Lindner1, Alexander Merle1, and Rabindra Mohapatra2 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Maryland Center for Fundamental Physics and Department of Physics, Maryland, USA
We discuss a one loop model for neutrino masses which leads to a seesaw-like formula with the difference that the charged lepton masses replace the unknown Dirac mass matrix present in the usual seesaw case. This is a considerable reduction of parameters in the neutrino sector and predicts a strong hierarchical pattern in the right handed neutrino mass matrix that is easily derived from a U(1)H family symmetry. The model is based on the left-right gauge group with an additional Z4 discrete symmetry which gives vanishing neutrino Dirac masses and finite Majorana masses arising at the one loop level. Furthermore, it is one of the few models that naturally allow for large (but not necessarily maximal) mixing angles in the lepton sector. A generalization of the model to the quark sector requires three iso-spin singlet vector-like down type quarks, as in E6. The model predicts an inert doublet type scalar dark matter.