Results 61 to 70 of about 19,573 (204)
Dissipative Effects on Reheating after Inflation
, 2013 The inflaton must convert its energy into radiation after inflation, which, in a conventional scenario, is caused by the perturbative inflaton decay. This reheating process would be much more complicated in some cases: the decay products obtain masses ...
Mukaida, Kyohei, Nakayama, Kazunori
core +1 more source
Pre-heating in the framework of massive gravity
Nuclear Physics B, 2016 In this paper we propose a mechanism of natural pre-heating of our universe by introducing an inflaton field dependent mass term for the gravitational wave for a specific class of massive gravity theory.
Debaprasad Maity
doaj +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
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Simple sinflaton-less α-attractors
Journal of High Energy Physics, 2019 We construct the simplest inflationary α-attractor models in supergravity: it has only one scalar, the inflaton. There is no sinflaton since the inflaton belongs to an orthogonal nilpotent superfield where the sinflaton depends on fermion bilinears. When
Renata Kallosh, Yusuke Yamada
doaj +1 more source
Reheating after inflation by supersymmetry breaking
European Physical Journal C: Particles and Fields, 2021 We study reheating after the end of inflation in models where the inflaton is the superpartner of goldstino and is charged under a gauged U(1) R-symmetry. We consider two classes of models – one is small field characterized by an almost flat Kähler space,
Yermek Aldabergenov +3 more
doaj +1 more source
Higgs Chaotic Inflation in Standard Model and NMSSM
, 2010 We construct a chaotic inflation model in which the Higgs fields play the role of the inflaton in the standard model as well as in the singlet extension of the supersymmetric standard model.
F. Bezrukov +11 more
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Generating the curvature perturbation with instant preheating [PDF]
, 2006 A new mechanism for generating the curvature perturbation at the end of inflaton has been investigated. The dominant contribution to the primordial curvature perturbation may be generated during the period of instant preheating.
Allahverdi R Enqvist K Garcia-Bellido J Mazumdar A +29 more
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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
Primordial non-Gaussianity from mixed inflaton-curvaton perturbations
, 2012 We characterise the primordial perturbations produced due to both inflaton and curvaton fluctuations in models where the curvaton has a quadratic, cosine or hyperbolic potential, and the inflaton potential is characterised by the usual slow-roll ...
Fonseca, José, Wands, David
core +1 more source
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