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Non-minimally coupled vector curvaton.

Research output: Contribution to journalJournal article

Published

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Journal publication date29/07/2008
JournalJournal of High Energy Physics
Journal number07
Volume2008
Number of pages10
Original languageEnglish

Abstract

It is shown that a massive Abelian vector boson field can generate the curvature perturbation in the Universe, when coupled non-minimally to gravity, through an RA2 coupling. The vector boson acts as a curvaton field imposing the curvature perturbation after the end of inflation, without generating a large-scale anisotropy. The parameter space of the model is fully explored, obtaining the relevant bounds on the inflation scale and the decay constant of the vector curvaton.

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