2004/03/31 by Marieke Postma · 2 citations
Physics and Astronomy · #Astrophysics #Big Bang nucleosynthesis #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Hubble's law #Inflation (cosmology) #Nucleosynthesis #Particle physics #Physics #Quantum mechanics #Scale (ratio) #Set (abstract data type) #Supernova #Theoretical physics #Upper and lower bounds #astro-ph #hep-ph
paper · pdf · doi:10.1088/1475-7516/2004/05/002
published as JCAP 0405 (2004) 002 · 22 pages
arxiv created 2004/04/28 · openalex publication_date 2004/05/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
In its simplest form the curvaton paradigm requires the Hubble parameter during inflation to be bigger than 10 8 GeV, but this bound may be evaded in non-standard settings. In the heavy curvaton scenario the curvaton mass increases significantly after the end of inflation. We reanalyse the bound in this set-up, taking into account the upper bound on the curvaton mass from direct decay. We obtain H * > 10 8 GeV if the mass increase occurs at the end of inflation, and H * > 10 −14 GeV if it occurs just before nucleosynthesis. We then discuss two implementations of the heavy curvaton. Parameters are constrained in these explicit models, and as a result even TeV scale inflation is hard to achieve.