Slow-roll parameters in braneworld cosmologies
High Energy Physics - Phenomenology
2009-11-10 v2 Astrophysics
High Energy Physics - Theory
Abstract
We present a general slow-roll formalism within braneworld-motivated cosmologies with non-standard effective Friedmann equations. Full towers of parameters involving either the inflaton potential or the Hubble parameter are constructed and the dynamics of non-tachyonic and tachyonic fields are considered in detail; exact cosmological solutions and the inflationary attractor condition are provided. We compare scalar-driven and tachyon-driven accelerating eras through slow-roll correspondence and the observational imprint on early-universe structures.
Keywords
Cite
@article{arxiv.hep-ph/0402126,
title = {Slow-roll parameters in braneworld cosmologies},
author = {Gianluca Calcagni},
journal= {arXiv preprint arXiv:hep-ph/0402126},
year = {2009}
}
Comments
28 pages REVTeX4, 4 figures; v2: new figures and comments, references added, the content of Appendix A has been moved into the main text. Accepted by Physical Review D