On Global Flipped SU(5) GUTs in F-theory

Understand

We construct an SU(4) spectral divisor and its factorization of types (3,1) and (2,2) based on the construction proposed in [1].

• We calculate the chiral spectra of flipped SU(5) GUTs by using the spectral divisor construction.
• The results agree with those from the analysis of semi-local spectral covers.
• Our computations provide an example for the validity of the spectral divisor construction and suggest that the standard heterotic formulae are applicable to the case of F-theory on an elliptically fibered Calabi-Yau fourfold with no heterotic dual.