Features and nongaussianity in the inflationary power spectrum
arXiv:0805.2147
Abstract
I summarize recent work on (1) constraining spike-like features in the cosmic microwave background and large scale structure; (2) nonstandard Friedmann equation in stabilized warped 6D brane cosmology, with applications to inflation; and (3) nonlocal inflation models, motivated by string theory, which can yield large nongaussian CMB fluctuations. Work in collaboration with N. Barnaby, T. Biswas, F. Chen, L. Hoi, G. Holder and S. Kanno.
8 pages, 7 figures; presented at 43rd Rencontres de Moriond, La Thuile (Val d'Aosta, Italy) March 15 - 22, 2008. Includes new implications of WMAP5 for chaotic inflation in 6D braneworld (arXiv:0801.0226) and spike-like features in the CMB (arXiv:0706.3887)
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