Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-08-17
Phys.Rev. D59 (1999) 106005
Physics
High Energy Physics
High Energy Physics - Theory
34 pages, Latex 2e with amsmath, typos removed, factors corrected, refs improved
Scientific paper
10.1103/PhysRevD.59.106005
We construct vacua of M-theory on S^1/Z_2 associated with Calabi-Yau three-folds. These vacua are appropriate for compactification to N=1 supersymmetry theories in both four and five dimensions. We allow for general E_8 x E_8 gauge bundles and for the presence of five-branes. The five-branes span the four-dimensional uncompactified space and are wrapped on holomorphic curves in the Calabi-Yau space. Properties of these vacua, as well as of the resulting low-energy theories, are discussed. We find that the low-energy gauge group is enlarged by gauge fields that originate on the five-brane world-volumes. In addition, the five-branes increase the types of new E_8 x E_8 breaking patterns allowed by the non-standard embedding. Characteristic features of the low-energy theory, such as the threshold corrections to the gauge kinetic functions, are significantly modified due to the presence of the five-branes, as compared to the case of standard or non-standard embeddings without five-branes.
Lukas Andre
Ovrut Burt A.
Waldram Daniel
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