Dresden 2013 – scientific programme

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T: Fachverband Teilchenphysik

T 15: Beyond the Standard Model (Theorie) 2

T 15.8: Talk

Monday, March 4, 2013, 18:30–18:45, WIL-A124

SO(10) Origin of Fermion Masses and Mixings, Effects of Renormalization Group Evolution and Predictions for as yet unmeasured Observables — •Alexander Dueck, Werner Rodejohann, and Yasutaka Takanishi — Max-Planck-Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany

Grand Unified Theories (GUTs) provide a compelling framework to establish and analyze possible relations between quarks and leptons. We analyze the possibility to explain the origin of fermion masses and mixings within several renormalizable SO(10) GUTs. We improve previous analyses by including effects of renormalization group evolution (RGE) and non-degenerate seesaw scales into our fits. In addition, in the neutrino sector we consider both the normal and the inverted hierarchy. Furthermore, we constrain the models by fitting the baryon asymmetry of the universe assuming it is produced through thermal leptogenesis. Supersymmetric and non-supersymmetric models with different Higgs representations are investigated for their ability to reproduce the data. After constraining the model parameters with experimental data we give the model predictions and allowed ranges for undetermined observables such as the leptonic CP violating phase and point out the importance to include full RGE into the analysis.