Chiral Four-Dimensional F-Theory Compactifications With SU(5) and Multiple U(1)-Factors

TL;DR

This paper develops geometric methods to analyze chiral matter spectra in four-dimensional F-theory compactifications with multiple U(1) factors and SU(5), providing explicit calculations and new conditions on G_4-flux.

Contribution

It introduces novel geometric techniques for determining matter spectra, flux conditions, and matter curves in F-theory compactifications with non-holomorphic sections and multiple U(1)s.

Findings

Explicit matter representations for U(1)xU(1) and SU(5)xU(1)xU(1) models.

Derived formulas for Euler numbers and G_4-flux conditions.

Performed detailed field theory computations confirming matter chiralities.

Abstract

We develop geometric techniques to determine the spectrum and the chiral indices of matter multiplets for four-dimensional F-theory compactifications on elliptic Calabi-Yau fourfolds with rank two Mordell-Weil group. The general elliptic fiber is the Calabi-Yau onefold in dP_2. We classify its resolved elliptic fibrations over a general base B. The study of singularities of these fibrations leads to explicit matter representations, that we determine both for U(1)xU(1) and SU(5)xU(1)xU(1) constructions. We determine for the first time certain matter curves and surfaces using techniques involving prime ideals. The vertical cohomology ring of these fourfolds is calculated for both cases and general formulas for the Euler numbers are derived. Explicit calculations are presented for a specific base B=P^3. We determine the general G_4-flux that belongs to H^{(2,2)}_V of the resolved Calabi-Yau fourfolds. As a by-product, we derive for the first time all conditions on G_4-flux in general F-theory compactifications with a non-holomorphic zero section. These conditions have to be formulated after a circle reduction in terms of Chern-Simons terms on the 3D Coulomb branch and invoke M-theory/F-theory duality. New Chern-Simons terms are generated by Kaluza-Klein states of the circle compactification. We explicitly perform the relevant field theory computations, that yield non-vanishing results precisely for fourfolds with a non-holomorphic zero section. Taking into account the new Chern-Simons terms, all 4D matter chiralities are determined via 3D M-theory/F-theory duality. We independently check these chiralities using the subset of matter surfaces we determined. The presented techniques are general and do not rely on toric data.