2016
DOI: 10.1103/physrevd.94.063525
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Curvaton scenarios with inflaton decays into curvatons

Abstract: We consider the possible decay of the inflaton into curvaton particles during reheating and analyse its effect on curvaton scenarios. Typical decay curvatons are initially relativistic then become nonrelativistic, changing the background history of the Universe. We show that this change to the background is the only way in which observational predictions of the scenario are modified. Moreover, once the required amplitude of perturbations is fixed by observation there are no signatures of such decays in other c… Show more

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Cited by 7 publications
(8 citation statements)
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“…In the simplest case, the curvaton is assumed to have a quadratic potential and negligible couplings to the inflaton field (any couplings could allow the inflaton to decay into the curvaton, which can have a big phenomenological impact given the initial subdominance of the curvaton [554,534,555,556]). In this case, analytic results exist for the spectral index of the curvaton perturbations and the local non-Gaussianity in terms of r decay…”
Section: Curvaton Perturbations and Local Non-gaussianitymentioning
confidence: 99%
“…In the simplest case, the curvaton is assumed to have a quadratic potential and negligible couplings to the inflaton field (any couplings could allow the inflaton to decay into the curvaton, which can have a big phenomenological impact given the initial subdominance of the curvaton [554,534,555,556]). In this case, analytic results exist for the spectral index of the curvaton perturbations and the local non-Gaussianity in terms of r decay…”
Section: Curvaton Perturbations and Local Non-gaussianitymentioning
confidence: 99%
“…One line of investigation is to revisit the simple inflationary models (see e.g. [3]). Here we tackle another question -are there alternative explanations of the signal?…”
Section: Introductionmentioning
confidence: 99%
“…In the simplest case, the curvaton is assumed to have a quadratic potential and negligible couplings to the inflaton field (any couplings could allow the inflaton to decay into the curvaton, which can have a big phenomenological impact given the initial subdominance of the curvaton [506,[526][527][528]). In this case, analytic results exist for the spectral index of the curvaton perturbations and the local non-Gaussianity in terms of r decay :…”
Section: Curvaton Perturbations and Local Non-gaussianitymentioning
confidence: 99%