Phenomenological gravitational constraints on strings and higher-dimensional theories

Details Phenomenological gravitational constraints on strings and higher-dimensional theories Phenomenological gravitational constraints on strings and higher-dimensional theories

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvl..63..224k&link_type=abstract

Physical Review Letters, Volume 63, Issue 3, July 17, 1989, pp.224-227

Other

173

Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Field Theories In Dimensions Other Than Four, Cosmology

Scientific paper

We investigate measurable gravitational and cosmological effects in four dimensions that can arise from the compactification of higher-dimensional theories incorporating gravity. We identify the nature of effects due to massless scalar components of the compactified higher-dimensional metric and due to modifications of cosmological dynamics. Current experimental data impose constraints on the viability of many higher-dimensional theories, including Kaluza-Klein, supergravity, and string theories. The phenomenological problems can be avoided if the components of the metric in the higher dimensions acquire an effective mass. We survey some possible mechanisms for mass generation.

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