Font, Anamaría Heterotic strings on \(G_{2}\) orbifolds. (English) Zbl 1294.81194 J. High Energy Phys. 2010, No. 11, Paper No. 115, 18 p. (2010). Summary: We study compactification of heterotic strings to three dimensions on orbifolds of \(G_{2}\) holonomy. We consider the standard embedding and show that the gauge group is broken from \(E_{8} \times E_{8}^{\prime}\) or SO(32) to \(F_{4} \times E_{8}^{\prime}\) or SO(25) respectively. We also compute the spectrum of massless states and compare with the results obtained from reduction of the 10-dimensional fields. Non-standard embeddings are discussed briefly. For type II compactifications we verify that IIB and IIA have equal massless spectrum. Cited in 3 Documents MSC: 81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory 81T60 Supersymmetric field theories in quantum mechanics 55N32 Orbifold cohomology 81T13 Yang-Mills and other gauge theories in quantum field theory 81R40 Symmetry breaking in quantum theory Keywords:superstrings and heterotic strings; superstring vacua; M-theory PDFBibTeX XMLCite \textit{A. Font}, J. High Energy Phys. 2010, No. 11, Paper No. 115, 18 p. (2010; Zbl 1294.81194) Full Text: DOI arXiv References: [1] D. Joyce, Compact Riemannian 7-manifolds with holonomy G2.I, J. Differ. Geom.43 (1996) 291. · Zbl 0861.53022 [2] D. Joyce, Compact Riemannian 7-manifolds with holonomy G2. II, J. Differ. Geom.43 (1996) 329. · Zbl 0861.53023 [3] D. Joyce, Compact manifolds with special holonomy, Oxford University Press, (2000). · Zbl 1027.53052 [4] G. Papadopoulos and P.K. Townsend, Compactification of D = 11 supergravity on spaces of exceptional holonomy, Phys. 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