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Type I background fields in terms of type IIB ones. (English) Zbl 1328.81184
Summary: We choose such boundary conditions for open IIB superstring theory which preserve $$N=1$$ SUSY. The explicit solution of the boundary conditions yields an effective theory which is symmetric under the world-sheet parity transformation $$\Omega:\sigma\to-\sigma$$. We recognize the effective theory as closed type I superstring theory. Its background fields, besides the known $$\Omega$$-even fields of the initial IIB theory, contain improvements quadratic in the $$\Omega$$-odd ones.

##### MSC:
 81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory
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##### References:
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