Orbifold compactifications with three families of Su(3) ×Su(2) ×U(1)n
TLDR
In this article, the authors constructed several N = 1 supersymmetric three-generation models with SU(3)×SU(2)×U(1)n gauge symmetry, obtained from the compactification of the heterotic string in the presence of constant gauge-background fields.About:
This article is published in Physics Letters B.The article was published on 1987-06-11 and is currently open access. It has received 298 citations till now. The article focuses on the topics: Heterotic string theory & Orbifold.read more
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Low-energy phenomenology of superstring-inspired E6 models
TL;DR: In this paper, the authors survey the low-energy phenomenological implications of superstring-inspired E 6 models and present experimental limits on these particles from both accelerator and non-accelerator data.
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Model-independent properties and cosmological implications of the dilaton and moduli sectors of 4D strings
TL;DR: In this paper, it was shown that if there is a realistic 4D string, the dilaton and moduli supermultiplets will generically acquire a small mass ∼ O(m 3 2 ), providing the only vacuum-independent evidence of low-energy physics in string theory beyond the supersymmetric standard model.
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Duality-anomaly cancellation, minimal string unification and the effective low-energy lagrangian of 4D strings
Luis E. Ibáñez,Dieter Lüst +1 more
TL;DR: In this paper, a general classification of all possible modular weights of massless fields in Abelian orbifolds is presented, and a general analysis of the possible relevance of those threshold corrections to the computation of sin 2 θW and α3 for all Abelian ABJ-like 4-D strings is presented.
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The flipped SU(5)×U(1) string model revamped
TL;DR: In this paper, a refined version of the flipped,SU(5)×U(1) string model with the following properties is presented: the complete massless spectrum is derived and shown to be free of all gauge and mixed anomalies apart from a single anomalous U(1).
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Proton stability in grand unified theories, in strings and in branes
Pran Nath,Pavel Fileviez Pérez +1 more
TL;DR: A broad overview of the current status of proton stability in unified models of particle interactions is given which includes non-supersymmetric unification, SUSY and SUGRA unified models, unification based on extra dimensions, and string-M-theory models as mentioned in this paper.
References
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Strings on orbifolds
TL;DR: In this article, the authors considered string propagation on the quotient of a flat torus by a discrete group and obtained an exactly soluble and more or less realistic method of string compactification.
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New Heterotic String Theories in Uncompactified Dimensions < 10
TL;DR: In this article, it was shown that infinitely many heterotic string theories exist in uncompactified dimensions less than 10, that are one-loop finite (for massless external legs).
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Some properties of O(32) superstrings
TL;DR: In this article, some properties of the anomaly-free O(32) superstring theory recently discovered by Green and Schwarz are discussed, which leads in four dimensions to an SU(5) theory with any desired number of standard generations (and no exotic or mirror fermions).
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Symmetry breaking patterns in superstring models
TL;DR: The SU(3) × SU(2) × U(1) couplings obey the standard relations after E6 breaking, so the standard computation of sin2θ is valid as mentioned in this paper.
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A Note on Toroidal Compactification of Heterotic String Theory
TL;DR: In this article, the connection of recently constructed lower dimensional heterotic strings with conventional toroidal compactification is clarified, and the connection between the two types of string structures is discussed in detail.