Hybrid inflation without flat directions and without primordial black holes
نویسندگان
چکیده
منابع مشابه
Hybrid Inflation without Flat Directions and without Primordial Black Holes
We investigate the possibility that the Universe may inflate due to moduli fields, corresponding to flat directions of supersymmetry, lifted by supergravity corrections. Using a hybrid-type potential we obtain a two-stage inflationary model. Depending on the curvature of the potential the first stage corresponds to a period of fast-roll inflation or a period of ‘locked’ inflation, induced by an...
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I study two-stage hybrid inflation driven by moduli fields, corresponding to flat directions of supersymmetry, lifted by supergravity corrections. The first stage corresponds to a period of either fast-roll or ‘locked’ inflation, induced by an oscillating inflaton. This is followed by a second stage of fast-roll inflation. Enough total e-foldings to encompass the cosmological scales are achieve...
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It is well known that energy density fluctuations at the early Universe give rise primordial black holes (BH) formation [1]. Widespread opinion is that these BHs are small enough with masses somewhere in the range MBH ∼ 10−5 − 10gram depending on specific model. What could be said about BHs with masses in the range 10 − 10gram? There exist a few number of inflationary models that predict BH pro...
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We examine the formation and evolution of primordial black holes (PBH’s) after hybrid inflation. Our goal is to assess the effects of various theoretical uncertainties on the extrapolation from a given inflation model to a spectrum of primordial black hole masses. The context of our work is an examination of the possibility[1, 2] that the dark matter is comprised of Planck-mass black hole remna...
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We study the properties of a completely integrable deformation of the CGHS dilaton gravity model in two dimensions. The solution is shown to represent a singularity free black hole that at large distances asymptoticaly joins to the CGHS solution. One of the fundamental unsolved problems in theoretical physics is the unification of quantum theory and gravity. One of the reason why this is so dif...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2005
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2005/06/008