Phys. Rev. Lett. 68, 3133–3136 (1992)Reinterpretation of Jordan-Brans-Dicke theory and Kaluza-Klein cosmologyReceived 6 April 1990; published in the issue dated 25 May 1992 We emphasize that it is the Pauli metric, not the Jordan metric, which describes the massless spin-two graviton in the Brans-Dicke theory. Similarly in the ‘‘Jordan-Brans-Dicke theory’’ based on Kaluza-Klein unification, only the Pauli metric can correctly describe Einstein’s theory of gravitation. This necessitates a completely new reinterpretation of the ‘‘old’’ Kaluza-Klein cosmology as well as the Brans-Dicke theory. More significantly our analysis shows that the Kaluza-Klein dilaton must generate a fifth force which could violate the equivalence principle. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.68.3133
DOI:
10.1103/PhysRevLett.68.3133
PACS:
04.50.+h, 11.10.Kk, 98.80.Dr
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