Oscillatory power spectrum and strongly $k$-dependent $r$ in hybrid inflation
General Relativity and Quantum Cosmology
2016-02-04 v1
Abstract
For the original hybrid inflation model, we calculate the power spectrum of curvature perturbations generated during the waterfall, taking into account the contribution of entropic modes. We study the regime where the potential is very flat, and in which inflation continues for more than about 60 e-folds. Results show oscillations in the scalar power spectrum, qualitatively similar to that of a single field axion monodromy potential; however no feature is displayed in the tensor power spectrum. Directions to develop a template for this power spectrum are also discussed.
Keywords
Cite
@article{arxiv.1602.01221,
title = {Oscillatory power spectrum and strongly $k$-dependent $r$ in hybrid inflation},
author = {R. Kabir and A. Mukherjee},
journal= {arXiv preprint arXiv:1602.01221},
year = {2016}
}
Comments
11 pages, 6 figures. arXiv admin note: text overlap with arXiv:1410.0685, arXiv:1412.1814 by other authors