GUT Scale Fermion Mass Ratios

Conference of Theoretical Physics and Nonlinear Phenomena 2014: "From Universe to String's Scale"

Spinrath, Martin^1

Institut für Theoretische Teilchenphysik, Karlsruhe Institute of Technology, Engesserstraße 7, Karlsruhe

D-76131, Germany^1

关键词: Fermion mass;    Mixing angle;    Neutrino experiments;    Scale ratio;    Symmetry-breaking;    Threshold corrections;    Yukawa couplings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/539/1/012002/pdf
DOI  :  10.1088/1742-6596/539/1/012002

来源: IOP

【 摘 要 】

We present a series of recent works related to group theoretical factors from GUT symmetry breaking which lead to predictions for the ratios of quark and lepton Yukawa couplings at the unification scale. New predictions for the GUT scale ratios yμ/ys, yτ/yband yt/ybin particular are shown and compared to experimental data. For this comparison it is important to include possibly large supersymmetric threshold corrections. Due to this reason the structure of the fermion masses at the GUT scale depends on TeV scale physics and makes GUT scale physics testable at the LHC. We also discuss how this new predictions might lead to predictions for mixing angles by discussing the example of the recently measured last missing leptonic mixing angle θ13making this new class of GUT models also testable in neutrino experiments.