Proceedings of the Particle Physics and Early Universe Conference (PPEUC).
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1 Introduction 

It is the Scalar and Tensor modes of Gaussian metric perturbations that are standardly produced in any cosmological inflation with one fundamental scalar field . The contributions of both modes due to the Sachs--Wolfe effect in the CMB temperature anisotropy convolved with the COBE DMR antenna, are commonly presented in terms of S and T parts:

Available observational data cannot yet discriminate the ratio T/S, thus, the latter currently remains a pure theoretical tool in the analysis.

PPEUC Proceedings
Wed Jul 23 11:53:34 BST 1997