Slow-roll parameters in braneworld cosmologies

Details Slow-roll parameters in braneworld cosmologies Slow-roll parameters in braneworld cosmologies

2004-02-11

arxiv.org/abs/hep-ph/0402126v2

Phys.Rev. D69 (2004) 103508

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages REVTeX4, 4 figures; v2: new figures and comments, references added, the content of Appendix A has been moved into the

Scientific paper

10.1103/PhysRevD.69.103508

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.

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