Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-05-15
JHEP 0103 (2001) 024
Physics
High Energy Physics
High Energy Physics - Theory
17 pages, latex, revised version with some rewriting and new comments added
Scientific paper
10.1088/1126-6708/2001/03/024
We study the bulk effective theory of a class of orbifolds of the type IIB string with D5-branes, compactified to four dimensions. These constructions are connected, in a region of their moduli space, to some orbifolds of the type I and heterotic string. We compare the effective actions through the coupling of the R^2 term, and we argue that these orbifolds provide non-perturbative deformations of the latter, in which the gauge group is entirely non-perturbative.
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