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Fifth force from Kaluza-Klein unification

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Abstract

We discuss the possible modification of Einstein's theory of gravitation due to the fifth force generated by the Kaluza-Klein dilaton. In particular we discuss the gravitational redshift, the deflection of light, the precession of perihelia, and the time-delay of radar echo around a spherically symmetric black hole in a 7-dimensional Kaluza-Klein unification which hasE 2 as the internal isometry. It is shown that the long-range effect of the higher-dimensional fifth force is characterized by the dilatonic charge carried by the black hole even when it is neutral.

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Cho, Y.M., Park, D.H. Fifth force from Kaluza-Klein unification. Gen Relat Gravit 23, 741–757 (1991). https://doi.org/10.1007/BF00755992

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