Curvaton paradigm can accommodate multiple low inflation scales
نویسندگان
چکیده
منابع مشابه
paradigm can accommodate multiple low inflation scales
Recent arguments show that some curvaton field may generate the cosmological curvature perturbation. As the curvaton is independent of the inflaton field, there is a hope that the fine-tunings of inflation models can be cured by the curvaton scenario. More recently, however, D.H.Lyth discussed that there is a strong bound for the Hubble parameter during inflation even if one assumes the curvato...
متن کامل0 v 1 1 8 A ug 2 00 3 Can the curvaton paradigm accommodate a low inflation scale ?
The cosmological curvature perturbation may be generated when some ‘curvaton’ field, different from the inflaton, oscillates in a background of unperturbed radiation. In its simplest form the curvaton paradigm requires the Hubble parameter during inflation to be bigger than 10 GeV, but this bound may be evaded if the curvaton field (or an associated tachyon) is strongly coupled to a field which...
متن کاملaccommodate a low inflation scale ?
The cosmological curvature perturbation may be generated when some ‘curvaton’ field, different from the inflaton, oscillates in a background of unperturbed radiation. In its simplest form the curvaton paradigm requires the Hubble parameter during inflation to be bigger than 10 GeV, but this bound may be evaded if the curvaton field (or an associated tachyon) is strongly coupled to a field which...
متن کاملCurvaton scenario with low scale inflation revisited
In its simplest form the curvaton paradigm requires the Hubble parameter during inflation to be bigger than 10GeV, 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 reanalyze the bound in this set up, taking into account the upper bound on the curvaton mass from direct decay. We obtain H...
متن کاملLow Scale Inflation and the Immediate Heavy Curvaton Decay
The end of a thermal inflation era, driven by the rolling of a flaton field coupled to the curvaton, cause a huge increment in the curvaton mass and decay rate while the curvaton is still frozen. It is shown that, if this increment is enough for the curvaton to immediately decay, low scale inflation with Hubble parameter H∗ ∼ 10 GeV is achieved for more natural values of the flaton-curvaton cou...
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2004
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/21/4/l02