CMB anisotropy predictions for a model of double inflation

Abstract

We consider a double-inflationary model with two massive scalar fields interacting only gravitationally in the context of a flat cold dark matter (CDM) Universe. The cosmic microwave background (CMB) temperature anisotropies produced in this theory are investigated in great details for a window of parameters where the density fluctuation power spectrum P(k) is in good agreement with observations. The first Doppler (``acoustic'') peak is a crucial test for this model as well as for other models. For the ``standard'' values of the cosmological parameters of CDM, our model is excluded if the height of the Doppler peak is sensibly higher than about three times the Sachs-Wolfe plateau.

12 pages LaTeX using revtex, to be published in Phys. Rev. D

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• A 120-Mpc Periodicity in the Three-Dimensional Distribution of Galaxy Superclusters
• New Cosmological Structures on Medium Angular Scales Detected with the Tenerife Experiments

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• Natural Double Inflation in Supergravity
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• Double Inflation in Supergravity and the Large Scale Structure
• Density Fluctuations and Primordial Black Hole Formation in Natural Double Inflation in Supergravity
• Large primordial gravitational wave background in a class of BSI Lambda-CDM models
• Double D-term inflation
• Testing Two-Field Inflation