Stringy Instantons in SU(N) N=2 Non-Conformal Gauge Theories
arXiv:1111.0842 · doi:10.1007/JHEP12(2011)070
Abstract
In this paper we explicitly obtain the leading corrections to the SU(N) N=2 prepotential due to stringy instantons both in flat space-time and in the presence of a non-trivial graviphoton background field. We show that the stringy corrections to the prepotential are expressible in terms of the elementary symmetric polynomials. For N>2 the theory is not conformal; we discuss the introduction of an explicit dependence on the string scale α' in the low-energy effective action through the stringy non-perturbative sector.
22 pages, 1 figure
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- 4d/3d reduction of s-confining theories: the role of the "exotic" D instantons