Instantons and holomorphic couplings in intersecting D-brane models

被引:51
作者
Akerblom, Nikolas [1 ]
Blumenhagen, Ralph
Luest, Dieter
Schmidt-Sommerfeld, Maximilian
机构
[1] Max Planck Inst Phys & Astrophys, Fohringer Ring 6, D-80805 Munich, Germany
[2] Univ Munich, Dept Phys, D-80333 Munich, Germany
关键词
intersecting branes models; supersymmetric effective theories;
D O I
10.1088/1126-6708/2007/08/044
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
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 Kahler 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.
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页数:24
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