Aspects of Type I Compactifications and Type I-Heterotic Duality

Details Aspects of Type I Compactifications and Type I-Heterotic Duality Aspects of Type I Compactifications and Type I-Heterotic Duality

1997-12-15

arxiv.org/abs/hep-th/9712141v1

J.Korean Phys.Soc.33:S500-S504,1998

Physics

High Energy Physics

High Energy Physics - Theory

Talk delivered at the V Korean-Italian Meeting on Relativistic Astrophysics, 8 pages, Latex

Scientific paper

We review the construction of open descendants of the type IIB superstring on the Z-orbifold. It results in a chiral four-dimensional model with gauge group $SO(8) \otimes U(12)$ and three generations of matter in the $(8,12^*)\oplus (1,66)$ representations. As a test of type I - heterotic duality, that reduces to a weak/weak duality in D=4, a heterotic model on the same orbifold is also presented. The massless spectrum reproduces exactly the one found in the type I case apart from additional twisted matter charged with respect to the SO(8) gauge group. The puzzle is solved by noting that at generic points in the moduli space these states get masses.

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