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dc.creatorVasilic, M
dc.identifier.issn2470-0010 (print)
dc.identifier.issn2470-0029 (electronic)
dc.description.abstractGeometric sigma models have been defined as geometric theories of metric excitations of a given background geometry, and then covariantized by identifying the coordinates of space-time with a set of scalar fields. By construction, these theories have the property of accommodating both the scalar matter of pure geometric origin and a ground state specified in advance. Using this fact, one can build a Kaluza-Klein geometric sigma model by specifying the background metric of the form M-4 x B-d, thus obtaining a theory free of the classical cosmological constant problem. Previously exploited ideas to use scalar fields in the form of a nonlinear sigma model coupled to gravity to trigger the compactification failed to give massless gauge fields after dimensional reduction. In this paper, sigma modified geometric a model is suggested, which reconciles the masslessness of the gauge fields with the zero value of the cosmological constant. [S0556-2821(99)03310-6].en
dc.sourcePhysical Review Den
dc.titleHigher-dimensional geometric sigma modelsen
dcterms.abstractВасилиц, М;
dc.citation.otherArticle Number: 025003

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