Axion isocurvature fluctuations with extremely blue spectrum
Cosmology and Nongalactic Astrophysics
2009-08-11 v2 High Energy Physics - Phenomenology
Abstract
We construct an axion model for generating isocurvature fluctuations with blue spectrum, n_{iso}=2-4, which is suggested by recent analyses of admixture of adiabatic and isocurvature perturbations with independent spectral indices, n_{ad} \ne n_{iso}. The distinctive feature of the model is that the spectrum is blue at large scales while scale invariant at small scales. This is naturally realized by the dynamics of the Peccei-Quinn scalar field.
Keywords
Cite
@article{arxiv.0904.3800,
title = {Axion isocurvature fluctuations with extremely blue spectrum},
author = {Shinta Kasuya and Masahiro Kawasaki},
journal= {arXiv preprint arXiv:0904.3800},
year = {2009}
}
Comments
5 pages, 1 figure, published version