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Scattering of gauge, matter, and moduli fields from intersecting branes

2004; Elsevier BV; Volume: 696; Issue: 1-2 Linguagem: Inglês

10.1016/j.nuclphysb.2004.06.052

1873-1562

Dieter Lüst, Peter Mayr, R. Richter, Stephan Stieberger,

Pulsars and Gravitational Waves Research

We calculate various tree-level (disk) scattering amplitudes involving gauge, matter and moduli fields in IIB toroidal orbifold/orientifold backgrounds with D9-, D5- respectively D7-, D3-branes or via T-duality D6-branes in type IIA compactifications. In type IIB the D-branes may have non-vanishing fluxes on their world-volume. From these results we extract the moduli and flux dependence of the tree-level gauge couplings, the metrics for the moduli and matter fields. The non-vanishing fluxes correspond in the T-dual type IIA description to intersecting D6-branes. This allows us to determine the moduli dependence of the tree-level matter field metrics in the effective action of intersecting D6-brane models. In addition we derive the physical Yukawa couplings with their correct normalization.