Moduli fixing in realistic string vacua

Faraggi, AE ORCID: 0000-0001-7123-6414 (2005) Moduli fixing in realistic string vacua Nuclear Physics B, 728 (1-3). pp. 83-108. ISSN 0550-3213

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Abstract

I demonstrate the existence of quasi-realistic heterotic-string models in which all the untwisted Kähler and complex structure moduli, as well as all of the twisted sectors moduli, are projected out by the generalized GSO projections. I discuss the conditions and characteristics of the models that produce this result. The existence of such models offers a novel perspective on the realization of extra dimensions in string theory. In this view, while the geometrical picture provides a useful mean to classify string vacua, in the phenomenologically viable cases there is no physical realization of extra dimensions. The models under consideration correspond to Z<inf>2</inf> × Z<inf>2</inf> orbifolds of six-dimensional tori, plus additional identifications by internal shifts and twists. The special property of the Z<inf>2</inf> × Z<inf>2</inf> orbifold is that it may act on the compactified dimensions as real, rather than complex, dimensions. This property enables an asymmetric projection on all six internal coordinates, which enables the projection of all the untwisted Kähler and complex structure moduli. © 2005 Elsevier B.V. All rights reserved.

Item Type:	Article
Additional Information:	31 pages. Standard LaTeX. Additional section on twisted moduli. typos corrected. Revised version to appear in NPB
Uncontrolled Keywords:	hep-th, hep-th, hep-ph
Subjects:	?? QC ??
Divisions:	Faculty of Science & Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	18 Aug 2008 13:27
Last Modified:	01 Mar 2026 08:54
DOI:	10.1016/j.nuclphysb.2005.08.028
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/424
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