Instanton effects in N=1 brane models and the Kahler metric of twisted matter

Details Instanton effects in N=1 brane models and the Kahler metric of twisted matter Instanton effects in N=1 brane models and the Kahler metric of twisted matter

2007-09-03

arxiv.org/abs/0709.0245v2

JHEP 0712:051,2007

Physics

High Energy Physics

High Energy Physics - Theory

33 pages, 4 figures. V2: improved discussion, clarifyng comments and references added. Version to be published in JHEP

Scientific paper

10.1088/1126-6708/2007/12/051

We consider locally consistent systems of magnetized D9 branes on an orbifolded six-torus which support N=1 gauge theories. In such realizations, the matter multiplets arise from "twisted" strings connecting different stacks of branes. The introduction of Euclidean 5 branes (E5) wrapped on the six-dimensional compact space leads to instanton effects. For instance, if the system is engineered so as to yield SQCD, a single E5 brane may account for the ADS/TVY superpotential. We discuss the subtle interplay that exists between the annuli diagrams with an E5 boundary and the holomorphicity properties of the effective low-energy action of the N=1 theory. The consistency of this picture allows to obtain information on the Kahler metric of the chiral matter multiplets arising from twisted strings.

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