2008/03/11 by Ralph Blumenhagen, Maximilian Schmidt-Sommerfeld
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1088/1126-6708/2008/07/027
published as JHEP0807:027,2008 · 34 pages, 8 figures
arxiv created 2008/03/11 · arxiv updated 2009/12/01
We provide arguments for the existence of novel hereinafter called poly-instanton corrections to holomorphic couplings in four-dimensional N=1 supersymmetric string compactifications. After refining quantitatively the D-brane instanton calculus for corrections to the gauge kinetic function, we explicitly apply it to the Type I toroidal orbifold defined in arXiv:0710.3080 and compare the results to the proposed heterotic S-dual model. This leads us to the intriguing conclusion that N=1 string vacua feature a power tower like proliferation of instanton corrections.