Ms
Paula Tuzon
(Departament de Física Teòrica - IFIC, Universitat de València)
24/08/2010, 16:12
Model
The alignment in flavour space of the Yukawa matrices of a general two-Higgs-doublet model (THDM) results in the absence of tree-level flavour-changing neutral currents. In addition to the usual masses and mixings, the aligned Yukawa structure is parametrized by three complex numbers which are potential new sources of CP violation. For particular values of these complex parameters all Z2-type...
Prof.
Yoshio Koide
(Osaka University)
24/08/2010, 16:29
Model
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...
Mr
Avelino Vicente
(IFIC - CSIC/U. Valencia)
24/08/2010, 16:46
Model
The seesaw mechanism is the most popular explanation for the smallness of neutrino masses. However, its high scale makes impossible to test it directly and only indirect signals at low energies are reachable for collider experiments. One of these indirect links with the high scale is LFV, known to be correlated with neutrino oscillation parameters in some scenarios. In this talk I will discuss...
Mr
Vinzenz Maurer
(Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut))
24/08/2010, 17:03
Model
We consider SUSY GUT models of flavour capable of explaining the flavour structure of quarks and leptons, via the spontaneous breaking of a non-Abelian family symmetry. We focus on the consequences of such models for the SUSY-flavour structure, i.e. for the soft SUSY breaking terms. We highlight generic features of models with real triplet representations and discuss a new class of models...
Mr
Martin Spinrath
(MPI for Physics)
24/08/2010, 17:20
Model
Group theoretical factors from GUT symmetry breaking can lead to predictions for the ratios of quark and lepton Yukawa couplings at the unification scale. Due to SUSY threshold corrections the viability of such predictions can depend strongly on the SUSY parameters. For three common minimal SUSY breaking scenarios we investigate which GUT scale ratios y_e/y_d, y_\mu/y_s, y_\tau/y_b and...
Dr
Akin Wingerter
(Indian Institute of Science)
24/08/2010, 17:37
Using the particle content of the Altarelli-Feruglio model as a
paradigm, we generalize the family symmetry A4 x Z3 to all 1048
groups of order less than or equal to 100 and derive the Lagrangian
for the lepton sector, the mixing matrices, and finally the mixing
angles. We compare our findings to experimental data and identify the
cases (i) where tribimaximal mixing occurs, (ii) where the...