Prof.
George Leontaris
(Ioannina University)
03/12/2014, 16:35
We discuss the origin of discrete symmetries in F-theory models. Motivated by the
neutrino sector, we focus on non-abelian discrete family symmetries associated to
monodromies. We combine them with SU(5) GUT and examine their low energy implications.
Andrew Meadowcroft
(University of Southampton)
03/12/2014, 17:10
F-theory is known to admit a number of discrete symmetries, such as $A_4$, $D_4$ and $Z_N$ symmetries. An introduction to the methods involved will be provided, with a view to discussing current work in the field.
Maria Dimou
(Southampton University)
03/12/2014, 18:15
The aim of this work is to provide an explanation for the masses and mixings of the Standard Model fermionic content as well as for its supersymmetric extensions, using an S4xU(1) family symmetry in an SU(5) background. The results are given in terms of mass insertion parameters and are compared to the latest experimental limits.
Catarina Simões
(IFPA, University of Liège)
03/12/2014, 18:45
We look for minimal chiral sets of fermions beyond the Standard Model that are anomaly-free and, simultaneously, vector-like particles with respect to color SU(3) and electromagnetic U(1). We then study whether the addition of such particles to the Standard Model particle content allows for the unification of gauge couplings at a high energy scale, above 5.0x10^15 GeV so as to be safely...
Miguel Crispim Romao
(University of Southampton)
03/12/2014, 19:15
Supersymmetry/Supergravity/Strings and Branes
We consider Grand Unified Theories based on $SO(10)$ which originate from $M$-theory on
$G_2$-manifolds. In this framework we are naturally led to a novel solution of
the doublet-triplet splitting problem involving an extra ${\bf 16}_X,{\bf {\overline{16}}}_X$ vector-like pair by considering discrete symmetries of the extra dimensions and preserving unification. Since Wilson line breaking...