New F-theory lifts

TL;DR

This paper presents a new method for constructing F-theory lifts of IIB orientifold models on Calabi-Yau complete intersections, broadening the scope to include more general involutions and O3-plane models.

Contribution

It introduces a procedure to explicitly lift perturbative IIB models to F-theory on Calabi-Yau complete intersections with arbitrary involution weights.

Findings

Enables F-theory lifts for models with arbitrary involution weights.

Allows construction of models with O3-planes.

Expands the class of Calabi-Yau geometries suitable for F-theory.

Abstract

In this note, a procedure is developed to explicitly construct non-trivial F-theory lifts of perturbative IIB orientifold models on Calabi-Yau complete intersections in toric varieties. This procedure works on Calabi-Yau orientifolds where the involution coordinate can have arbitrary projective weight, as opposed to the well-known hypersurface cases where it has half the weight of the equation defining the CY threefold. This opens up the possibility of lifting more general setups, such as models that have O3-planes.