Brane world effective actions from D-branes with fluxes

by Marco Billo (Università di Torino)

Tuesday 15 Nov 2005, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

We develop systematic string techniques to study brane world effective actions for models with magnetized (or equivalently intersecting) D-branes. In particular, we derive the dependence on the NS-NS moduli of the kinetic terms for the chiral matter in the case of general non-supersymmetric brane configurations with non-commuting open string fluxes. Near a N=1 supersymmetric point the effective action is consistent with a Fayet-Iliopoulos supersymmetry breaking and the normalization of the scalar kinetic terms is nothing else than the Kahler metric. We also discuss, in this generalized set up, how the Kahler metric enters in the physical Yukawa couplings and how to extract the form of the superpotential.