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  1. Pubblicazioni

Stringy instanton corrections to N=2 gauge couplings

Articolo
Data di Pubblicazione:
2010
Abstract:
We discuss a string model where a conformal four-dimensional N=2 gauge theory receives corrections to its gauge kinetic functions from "stringy" instantons. These contributions are explicitly evaluated by exploiting the localization properties of the integral over the stringy instanton moduli space. The model we consider corresponds to a setup with D7/D3-branes in type I' theory compactified on T_4/Z_2 x T_2, and possesses a perturbatively computable heterotic dual. In the heteoric side the corrections to the quadratic gauge couplings are provided by a 1-loop threshold computation and, under the duality map, match precisely the first few stringy instanton effects in the type I' setup. This agreement represents a very non-trivial test of our approach to the exotic instanton calculus.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Superstrings; D-branes; Gauge Theories; Instantons; Heterotic String
Elenco autori:
Marco Billo'; Marialuisa Frau; Francesco Fucito; Alberto Lerda; Jose. F. Morales; Rubik Poghossian
Autori di Ateneo:
BILLO' Marco
FRAU Marialuisa
Link alla scheda completa:
https://iris.unito.it/handle/2318/76708
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/76708/1080212/JHEP05(2010)107.pdf
Pubblicato in:
JOURNAL OF HIGH ENERGY PHYSICS
Journal
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URL

http://arxiv.org/abs/1002.4322
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