Gauge threshold corrections in intersecting brane world models

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 = I and N = 2 open string subsectors. In contrast to what is known from ordinary orbifold theories, N = 1 subsectors do give rise to moduli-dependent one-loop corrections. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim