The N=1 effective actions of D-branes in Type IIA and IIB orientifolds

Details The N=1 effective actions of D-branes in Type IIA and IIB orientifolds The N=1 effective actions of D-branes in Type IIA and IIB orientifolds

2011-04-12

arxiv.org/abs/1104.2328v2

Nuclear Physics, Section B 855 (2012), pp. 639-694

Physics

High Energy Physics

High Energy Physics - Theory

61 pages, v2: typos corrected and refs added

Scientific paper

10.1016/j.nuclphysb.2011.10.019

We discuss the four-dimensional N=1 effective actions of single space-time filling Dp-branes in general Type IIA and Type IIB Calabi-Yau orientifold compactifications. The effective actions depend on an infinite number of normal deformations and gauge connection modes. For D6-branes the N=1 Kaehler potential, the gauge-coupling function, the superpotential and the D-terms are determined as functions of these fields. They can be expressed as integrals over chains which end on the D-brane cycle and a reference cycle. The infinite deformation space will reduce to a finite-dimensional moduli space of special Lagrangian submanifolds upon imposing F- and D-term supersymmetry conditions. We show that the Type IIA moduli space geometry is captured by three real functionals encoding the deformations of special Lagrangian submanifolds, holomorphic three-forms and Kaehler two-forms of Calabi-Yau manifolds. These elegantly combine in the N=1 Kaehler potential, which reduces after applying mirror symmetry to the results previously determined for space-time filling D3-, D5- and D7-branes. We also propose general chain integral expressions for the Kaehler potentials of Type IIB D-branes.

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