1202.3138 (Sven Krause et al.)

Gauge Fluxes in F-theory and Type IIB Orientifolds    [PDF]

Sven Krause, Christoph Mayrhofer, Timo Weigand

We provide a detailed correspondence between G_4 gauge fluxes in F-theory
compactifications with SU(n) and SU(n)x(1) gauge symmetry and their Type IIB
orientifold limit. Based on the resolution of the relevant F-theory Tate models
we classify the factorisable G_4-fluxes and match them with the set of
universal D5-tadpole free U(1)-fluxes in Type IIB. Where available, the global
version of the universal spectral cover flux corresponds to Type IIB gauge flux
associated with a massive diagonal U(1). In U(1)-restricted Tate models extra
massless abelian fluxes exist which are associated with specific linear
combinations of Type IIB fluxes. Key to a quantitative match between F-theory
and Type IIB is a proper treatment of the conifold singularity encountered in
the Sen limit of generic F-theory models. We also collect evidence that the
Type IIB orientifold limit of the considered Tate models involves a non-trivial
B-field and shed further light on the brane recombination process relating
generic and U(1)-restricted Tate models.

View original: http://arxiv.org/abs/1202.3138