Heterotic orbifolds

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A review of orbifold geometry is given, followed by a review of the construction of four-dimensional heterotic string models by compactification on a six-dimensional Z{sub 3} orbifold. Particular attention is given to the details of the transition from a classical theory to a first-quantized theory. Subsequently, a discussion is given of the systematic enumeration of all standard-like three generation models subject to certain limiting conditions. it is found that the complete set is described by 192 models, with only five possibilities for the hidden sector gauge group. It is argued that only four of the hidden sector gauge groups are ... continued below

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130 pages

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Giedt, Joel April 1, 2002.

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Description

A review of orbifold geometry is given, followed by a review of the construction of four-dimensional heterotic string models by compactification on a six-dimensional Z{sub 3} orbifold. Particular attention is given to the details of the transition from a classical theory to a first-quantized theory. Subsequently, a discussion is given of the systematic enumeration of all standard-like three generation models subject to certain limiting conditions. it is found that the complete set is described by 192 models, with only five possibilities for the hidden sector gauge group. It is argued that only four of the hidden sector gauge groups are viable for dynamical supersymmetry breaking, leaving only 175 promising models in the class. General features of the spectra of matter states in all 175 models are discussed. Twenty patterns of representations are found to occur. Accommodation of the Minimal Supersymmetric Standard Model (MSSM) spectrum is addressed. States beyond those contains in the MSSM and nonstandard hypercharge normalization are shown to be generic, though some models do allow for the usual hypercharge normalization found in SU(5) embeddings of the Standard Model gauge group. Only one of the twenty patterns of representations, comprising seven of the 175 models, is found to be without an anomalous U(1). Various quantities of interest in effective supergravity model building are tabulated for the set of 175 models. String scale gauge coupling unification is shown to be possible, albeit contrived, in an example model.

Physical Description

130 pages

Notes

INIS; OSTI as DE00796101

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  • Other Information: TH: Thesis (Ph.D.); Submitted to the University of California, Berkeley, CA (US)

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  • Report No.: LBNL--50169
  • Report No.: UCB-PTH-02/19
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 796101
  • Archival Resource Key: ark:/67531/metadc734170

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 1, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • April 4, 2016, 1:05 p.m.

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Giedt, Joel. Heterotic orbifolds, thesis or dissertation, April 1, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc734170/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.