Imprints of the Metrically-coupled Dilaton on Density Perturbations in Inflationary Cosmology

Details Imprints of the Metrically-coupled Dilaton on Density Perturbations in Inflationary Cosmology Imprints of the Metrically-coupled Dilaton on Density Perturbations in Inflationary Cosmology

1997-08-15

arxiv.org/abs/gr-qc/9708030v2

Nucl.Phys. B530 (1998) 304-324

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

title changed, 20 pages, to appear in Nucl.Phys.B

Scientific paper

10.1016/S0550-3213(98)00412-X

Spectra of density perturbations produced during chaotic inflation are calculated, taking both adiabatic and isocurvature modes into account in a class of scalar-tensor theories of gravity in which the dilaton is metrically coupled. Comparing the predicted spectrum of the cosmic microwave background radiation anisotropies with the one observed by the COBE-DMR we calculate constraints on the parameters of these theories, which turn out to be stronger by an order-of-magnitude than those obtained from post-Newtonian experiments.

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