# SUSY10

Aug 23 – 28, 2010
Bonn
Europe/Berlin timezone

## Supersymmetric Yukawaon Model

Aug 24, 2010, 4:29 PM
15m
Wolfgang-Paul-HS (Bonn)

Nussallee 12

### Speaker

Prof. Yoshio Koide (Osaka University)

### Description

In the yukawaon model, effective Yukawa coupling constants $Y_f^{eff}$ are given by vacuum expectation values (VEVs) of gauge singlet scalars $Y_f$ ("yukawaons"): $(Y_f^{eff})_{ij} =(y_f/\Lambda) \langle (Y_f)_{ij} \rangle$ ($i,j=1,2,3$), where $\Lambda$ is a scale of an effective theory. Differently from a Froggatt-Nielsen type model, we introduce each yukawaon $Y_f$ for each fermion sector $f$ ($f=u,d, \dots$). A unified description of quark and lepton mass matrices is realized by introducing a further fundamental scalar field $\Phi_e$ and by considering that each VEV structure $\langle Y_f \rangle$ is given by a bilinear form of the VEV matrix $\langle \Phi_e \rangle$. Such VEV matrix relations are obtained from supersymmetric vacuum conditions for a superpotential which is invariant under flavor symmetries concerned. As a result, the observed tribimaximal neutrino mixing, CKM quark mixing, and quark mass ratios are explained with quite few parameters, without assuming any discrete symmetry for the neutrino sector. References: Y.Koide, Phys.Lett. B680, 76 (2009); Y.Koide, Phys.Lett. B687, 219 (2010).

### Primary author

Prof. Yoshio Koide (Osaka University)

 Slides