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000192487 1001_ $$0P:(DE-HGF)0$$aMelville, Scott$$b0$$eCorresponding author
000192487 245__ $$aQuantifying the `naturalness' of the curvaton model
000192487 260__ $$aLondon$$bIOP$$c2014
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000192487 520__ $$aWe investigate the probability of obtaining an observable curvature perturbation, using as an example the minimal curvaton-higgs (MCH) model. We determine ``probably observable'' and ``probably excluded'' regions of parameter space assuming generic initial conditions and applying a stochastic approach for the curvaton's evolution during inflation. Inflation is assumed to last longer than the N(obs) simeq 55 observable e-folds, and the total number of e-folds of inflation determines the particular ranges of parameters that are probable. For the MCH model, these ``probably observable'' regions always lie within the range 8 × 10(4) GeV ≤ m(σ) ≤ 2 × 10(7) GeV, where m(σ) is the curvaton mass, and the Hubble scale at horizon exit is chosen as H(*) = 10(10) GeV. Because the ``probably observable'' region depends on the total duration of inflation, information on parameters in the Lagrangian from particle physics and from precision CMB observations can therefore provide information about the total duration of inflation, not just the last N(obs) e-folds. This method could also be applied to any model that contains additional scalar fields to determine the probability that these scalar fields contribute to the curvature perturbation.
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000192487 650_7 $$2INSPIRE$$acurvature: perturbation
000192487 650_7 $$2INSPIRE$$afield theory: scalar
000192487 650_7 $$2INSPIRE$$acurvaton: mass
000192487 650_7 $$2INSPIRE$$ainflation
000192487 650_7 $$2INSPIRE$$acosmic background radiation
000192487 650_7 $$2INSPIRE$$aboundary condition
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000192487 65020 $$2Author$$ainflation 
000192487 65020 $$2Author$$ainitial conditions and eternal universe 
000192487 65020 $$2Author$$anon-gaussianity 
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000192487 7001_ $$0P:(DE-H253)PIP1020872$$aLerner, Rose$$b1$$eCorresponding author
000192487 773__ $$0PERI:(DE-600)2104147-7$$a10.1088/1475-7516/2014/07/026$$gVol. 2014, no. 07, p. 026 - 026$$n07$$p026$$tJournal of cosmology and astroparticle physics$$v2014$$x1475-7516$$y2014
000192487 7870_ $$0DESY-2014-02303$$aLerner, Rose et.al.$$d2014$$iIsParent$$rDESY-14-015 ; arXiv:1402.3176$$tQuantifying the 'naturalness' of the curvaton model
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