Cosmic Microwave Background anisotropies and extra dimensions in String Cosmology
arXiv:astro-ph/9905327 · doi:10.1103/PhysRevLett.83.4464
Abstract
A recently proposed mechanism for large-scale structure in string cosmology --based on massless axionic seeds-- is further analyzed and extended to the acoustic-peak region. Existence, structure, and normalization of the peaks turn out to depend crucially on the overall evolution of extra dimensions during the pre-big bang phase: conversely, precise cosmic microwave background anisotropy data in the acoustic-peak region will provide, within the next decade, a window on string-theory's extra dimensions before their eventual compactification.
4 pages, 3 figures, to appear in Physical Review Letters
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