Instantons and Holomorphic Couplings in Intersecting D-brane Models
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In this article, the moduli dependence of the matter field Kaehler potentials of intersecting D6-brane models on the torus has been investigated and the issue of holomorphy for E2-instanton corrections to the superpotential has been discussed.Abstract:
We clarify certain aspects and discuss extensions of the recently introduced string D-instanton calculus (hep-th/0609191). The one-loop determinants are related to one-loop open string threshold corrections in intersecting D6-brane models. Utilising a non-renormalisation theorem for the holomorphic Wilsonian gauge kinetic functions, we derive a number of constraints for the moduli dependence of the matter field Kaehler potentials of intersecting D6-brane models on the torus. Moreover, we compute string one-loop corrections to the Fayet-Iliopoulos terms on the D6-branes finding that they are proportional to the gauge threshold corrections. Employing these results, we discuss the issue of holomorphy for E2-instanton corrections to the superpotential. Eventually, we discuss E2-instanton corrections to the gauge kinetic functions and the FI-terms.read more
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References
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Journal ArticleDOI
Four-dimensional string compactifications with D-branes, orientifolds and fluxes
TL;DR: In this paper, a review article provides a pedagogical introduction to various classes of chiral string compactifications to four dimensions with D-branes and fluxes with the main concern being to provide all necessary technical tools to explicitly construct four-dimensional orientifold vacua, with the final aim to come as close as possible to the supersymmetric standard model.
Journal ArticleDOI
Toward realistic intersecting d-brane models
TL;DR: In this paper, a pedagogical introduction to a recently studied class of phenomenologically interesting string models known as Intersecting D-Brane Models is provided, where the gauge fields of the Standard Model are localized on D-branes wrapping certain compact cycles on an underlying geometry, whose intersections can give rise to chiral fermions.
Journal ArticleDOI
Solution of the anomaly puzzle in SUSY gauge theories and the Wilson operator expansion
TL;DR: In this article, the authors complete a series of works on β functions and the anomaly problem in supersymmetric theories and obtain exact expressions for the β functions within the framework of standard perturbation theory.
Journal ArticleDOI
Spacetime instanton corrections in 4D string vacua: The Seesaw mechanism for D-Brane models
TL;DR: In this paper, the authors systematically investigate instanton corrections from Euclidean D-branes to the matter field superpotential of various classes of N = 1 supersymmetric Dbrane models in four dimensions.
Journal ArticleDOI
Duality-anomaly cancellation, minimal string unification and the effective low-energy lagrangian of 4D strings
Luis E. Ibáñez,Dieter Lüst +1 more
TL;DR: In this paper, a general classification of all possible modular weights of massless fields in Abelian orbifolds is presented, and a general analysis of the possible relevance of those threshold corrections to the computation of sin 2 θW and α3 for all Abelian ABJ-like 4-D strings is presented.