Time variation of G and within models with extra dimensions
- 21 August 2003
- journal article
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 20 (18) , 3885-3896
- https://doi.org/10.1088/0264-9381/20/18/302
Abstract
We derive the formulae for the time variation of the gravitational 'constant' G and of the fine structure 'constant' α in various models with extra dimensions and analyse their consistency with the available observational data for distant supernovae. We find that the reported variation of α translates into a small variation of G that makes distant supernovae to appear brighter, in contrast to recent observations of high z supernovae. The significance of these results within the framework of some cosmological scenarios is also discussed. We find, however, that the magnitude of the effect is not large enough to safely discard the models with extra dimensions studied here.Keywords
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This publication has 50 references indexed in Scilit:
- The fundamental constants and their variation: observational and theoretical statusReviews of Modern Physics, 2003
- The string dilation and a least coupling principleNuclear Physics B, 1994
- Observational limits on the time evolution of extra spatial dimensionsPhysical Review D, 1987
- Time Variation of Newton's Gravitational Constant in Superstring TheoriesPhysical Review Letters, 1986
- Comment on ‘‘Time variation of fundamental constants, primordial nucleosynthesis, and the size of extra dimensions.’’Physical Review D, 1986
- Time variation of fundamental constants, primordial nucleosynthesis, and the size of extra dimensionsPhysical Review D, 1986
- Time Variation of the Fundamental "Constants" and Kaluza-Klein TheoriesPhysical Review Letters, 1984
- Where has the fifth dimension gone?Physical Review D, 1980
- The Large Numbers hypothesis and the Einstein theory of gravitationProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1979
- The Cosmological ConstantsNature, 1937