Nonstandard embedding and five-branes in heterotic M theory
- Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396 (United States)
- Department of Physics, Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)
We construct vacua of M theory on S{sup 1}/Z{sub 2} associated with Calabi-Yau threefolds. These vacua are appropriate for compactification to N=1 supersymmetry theories in both four and five dimensions. We allow for general E{sub 8}{times}E{sub 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 manifold. 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{sub 8}{times}E{sub 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. thinsp {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 337604
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 10 Vol. 59; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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