Chiral Asymmetry in Four-Dimensional Open-String Vacua

Details Chiral Asymmetry in Four-Dimensional Open-String Vacua Chiral Asymmetry in Four-Dimensional Open-String Vacua

1996-06-26

arxiv.org/abs/hep-th/9606169v3

Phys.Lett. B385 (1996) 96-102

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, LaTeX, misprints corrected, version to appear in Physics Letters B

Scientific paper

10.1016/0370-2693(96)00869-6

Starting from the type IIB string on the Z orbifold, we construct some chiral open-string vacua with N=1 supersymmetry in four dimensions. The Chan-Paton group depends on the (quantized) NS-NS antisymmetric tensor. The largest choice, SO(8)xSU(12)xU(1), has an anomalous U(1) factor whose gauge boson acquires a mass of the order of the string scale. The corresponding open-string spectrum comprises only Neumann strings and includes three families of chiral multiplets in the (8,12*) + (1,66) representation. A comparison is drawn with a heterotic vacuum with non-standard embedding, and some properties of the low-energy effective field theory are discussed.

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