Orateur
Description
It is remarkable that the matter fields in the Standard Model (SM)
are apparently unified into the SU(5) representations.
A straightforward explanation of this fact is to embed all the SM gauge group into a simple group containing SU(5).
Recently, however, a new framework ``fake GUT" has been proposed.
In this new framework,
the apparent matter unification can be explained by a chiral gauge group 𝐺, 𝐺⊃SU(5).
We emphasize that the SM matter fields are not necessarily embedded into the chiral representations to explain the apparent unification.
In the previous work,
a concrete model based on a non-simple group, SU(5)×U(2), has been studied.
In this paper, we extend the model to the one based on a semi-simple group, SU(5)×SU(3).
With this extension, we can successfully explain the charge quantization, avoiding the Landau pole problem in the original model.
