Slow-roll parameters in braneworld cosmologies

Gianluca Calcagni

Slow-roll parameters in braneworld cosmologies

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arxiv hep-ph/0402126 v2 pith:TQA6OXMK submitted 2004-02-11 hep-ph astro-phhep-th

Gianluca Calcagni This is my paper

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keywords slow-rollcosmologiesparametersacceleratingattractorbraneworldbraneworld-motivatedcompare

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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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