The effective action of D7-branes in N=1 Calabi-Yau orientifolds

Details The effective action of D7-branes in N=1 Calabi-Yau orientifolds The effective action of D7-branes in N=1 Calabi-Yau orientifolds

2004-09-08

arxiv.org/abs/hep-th/0409098v3

Nucl.Phys.B705:167-211,2005

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 47 pages; references added; minor corrections

Scientific paper

10.1016/j.nuclphysb.2004.11.009

Using a Kaluza-Klein reduction of the Dirac-Born-Infeld and Chern-Simons action we compute the four dimensional N=1 effective action for the massless modes of a D7-brane which is wrapped on a four-cycle of a compact Calabi-Yau orientifold. We do not consider a specific orientifold but instead determine the Kahler potential, the gauge kinetic functions and the scalar potential in terms of geometrical data of a generic orientifold and its wrapped four-cycle. In particular we derive the couplings of the D-brane excitations to the bulk moduli of the orientifold as they are important for the study of soft supersymmetry breaking terms. We relate the resulting Kahler geometry to the N=1 special geometry of Lerche, Mayr and Warner. Finally we comment on the structure of the D-term which is induced by a Green-Schwarz term in the Chern-Simons action.

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