Results 71 to 80 of about 20,263 (249)
Journal of High Energy Physics, 2019 We present a unified model where the same scalar field can drive inflation and account for the present dark matter abundance. This scenario is based on the incomplete decay of the inflaton field into right-handed neutrino pairs, which is accomplished by ...
António Torres Manso, João G. Rosa
doaj +1 more source
The inflaton as dark matter [PDF]
The European Physical Journal C, 1998 17 pages, 4 eps-figures. To be published in Zeitschr. fuer Physik C.
Barshay, Saul, Kreyerhoff, Georg
openaire +2 more sources
The Landscape, the Swampland and the Era of Precision Cosmology
Fortschritte der Physik, Volume 67, Issue 1-2, January-February 2019., 2019 Abstract We review the advanced version of the KKLT construction and pure de Sitter supergravity, involving a nilpotent multiplet, with regard to various conjectures that de Sitter state cannot exist in string theory. We explain why we consider these conjectures problematic and not well motivated, and why the recently proposed alternative string theory
Yashar Akrami +3 more
wiley +1 more source
Comprehensive analysis of the simplest curvaton model [PDF]
, 2014 We carry out a comprehensive analysis of the simplest curvaton model, which is based on two non-interacting massive fields. Our analysis encompasses cases where the inflaton and curvaton both contribute to observable perturbations, and where the curvaton
Byrnes, Christian T +2 more
core +2 more sources
Journal of High Energy Physics, 2021 In traditional models only an order one fraction of energy is transferred from the inflaton to radiation through nonperturbative resonance production in preheating immediately after inflation, due to backreaction effects. We propose a particle production
JiJi Fan, Kaloian D. Lozanov, Qianshu Lu
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The Importance of Scalar Fields as Extradimensional Metric Components in Kaluza‐Klein Models
Advances in Astronomy, Volume 2019, Issue 1, 2019., 2019 Extradimensional models are achieving their highest popularity nowadays, among other reasons, because they can plausible explain some standard cosmology issues, such as the cosmological constant and hierarchy problems. In extradimensional models, we can infer that the four‐dimensional matter rises as a geometric manifestation of the extra coordinate ...
P. H. R. S. Moraes +2 more
wiley +1 more source
Relic gravity waves and 7 keV dark matter from a GeV scale inflaton
Physics Letters B, 2014 We study the mechanism of generation of 7 keV sterile neutrino Dark Matter (DM) in the model with light inflaton χ, which serves as a messenger of scale invariance breaking.
F.L. Bezrukov, D.S. Gorbunov
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Inflatonic Solitons In Running Mass Inflation [PDF]
, 2002 The inflaton condensate associated with a global symmetry can fragment into quasistable Q balls, provided the inflaton oscillations give rise to an effective equation of state with negative pressure.
Enqvist, Kari +2 more
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Observable signatures of inflaton decays [PDF]
Journal of Cosmology and Astroparticle Physics, 2011 26 pages, 5 ...
Battefeld, Diana +3 more
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Recent Developments in Degenerate Higher Order Scalar Tensor Theories
Annalen der Physik, Volume 537, Issue 2, February 2025.Degenerate Higher Order Scalar Tensor theories are reviewed, together with their applications in cosmology and astrophysics. These theories have been applied to build models of the early universe, in the description of the late‐time cosmic acceleration, as well as in astrophysics, including black hole physics. They have the potential to provide answers
Andrei Lazanu
wiley +1 more source