Weak mixing angle and proton stability in F-theory GUT Original Research Article

It is pointed out that a class of flipped image models based on F-theory naturally explains the gauge coupling unification. It is because the gauge group image is embedded in image and image. To prohibit the dimension 4 and 5 proton decay processes, the structure group associated with monodromy should be image or smaller. Extra heavy vector-like pairs of image except only one pair of Higgs should be disallowed, because they could induce the unwanted dimension 5 proton decays. We construct a simple global F-theory model considering these points. To maintain image at the GUT scale, the fluxes are turned on only on the flavor branes.