Speaker
Miguel Crispim Romao
(University of Southampton)
Description
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 preserves the rank of the gauge group, the necessary $U(1)$ gauge breaking is generated from extra multiplets. The main prediction of the approach is the existence of light states with the quantum numbers of a ${\bf 16}_X,{\bf {\overline{16}}}_X$ vector-like pair which could show up in future LHC searches.
Author
Miguel Crispim Romao
(University of Southampton)
