Gauge Threshold Corrections in Intersecting Brane World Models

TL;DR

This paper computes one-loop gauge coupling corrections in N=1 supersymmetric intersecting D6-brane models, revealing moduli-dependent effects from N=1 subsectors, which differ from ordinary orbifold theories.

Contribution

It provides the first detailed calculation of gauge threshold corrections in intersecting brane models, highlighting the moduli dependence from N=1 sectors.

Findings

N=1 subsectors contribute moduli-dependent corrections

Corrections differ from those in ordinary orbifold theories

Both N=1 and N=2 open string sectors contribute

Abstract

We calculate the one-loop corrections to gauge couplings in N=1 supersymmetric brane world models, which are realized in an type IIA orbifold/orientifold background with several stacks of D6 branes wrapped on 3-cycles with non-vanishing intersections. Contributions arise from both N=1 and N=2 open string subsectors. In contrast to what is known from ordinary orbifold theories, N=1 subsectors give rise to moduli-dependent one-loop corrections.