Results 41 to 50 of about 19,573 (204)
Towards a reliable effective field theory of inflation
Physics Letters B, 2021 We present the first quantum field theory model of inflation that is renormalizable in the matter sector, with a super-Hubble inflaton mass and sub-Planckian field excursions, which is thus technically natural and consistent with a high-energy completion
Mar Bastero-Gil +3 more
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Preheating in Derivatively-Coupled Inflation Models [PDF]
, 2007 We study preheating in theories where the inflaton couples derivatively to scalar and gauge fields. Such couplings may dominate in natural models of inflation, in which the flatness of the inflaton potential is related to an approximate shift symmetry of
Arkani-Hamed N +8 more
core +3 more sources
Strongly coupled inflaton [PDF]
Journal of Cosmology and Astroparticle Physics, 2011 We continue to investigate properties of the strongly coupled inflaton in a setup introduced in arXiv:0807.3191 through the AdS/CFT correspondence. These properties are qualitatively different from those in conventional inflationary models. For example, in slow-roll inflation, the inflaton velocity is not determined by the shape of potential; the fine ...
openaire +2 more sources
Inflaton decay through supergravity effects [PDF]
Physics Letters B, 2006 18 pages, 4 figures.
Endo, M. +3 more
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Nonminimally coupled pseudoscalar inflaton [PDF]
Physical Review D, 2018 We consider a scenario in which the inflaton $ $ is a pseudoscalar field non-minimally coupled to gravity through a term of the form ${\cal X} R ^2$. The pseudoscalar is also coupled to a $U(1)$ gauge field (or an ensemble of ${\cal N}$ gauge fields) through an axial coupling of the form $ F \tilde{F}$. After M. M. Anber and L. Sorbo, Phys. Rev.
Beltrán Almeida, Juan P. +1 more
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UV Shadows in EFTs: Accidental Symmetries, Robustness and No‐Scale Supergravity
Fortschritte der Physik, Volume 68, Issue 10, October 2020., 2020 Abstract We argue that accidental approximate scaling symmetries are robust predictions of weakly coupled string vacua, and show that their interplay with supersymmetry and other (generalised) internal symmetries underlies the ubiquitous appearance of no‐scale supergravities in low‐energy 4D EFTs.
C. P. Burgess +4 more
wiley +1 more source
Gravitational-wave mediated preheating
Physics Letters B, 2015 We propose a new preheating mechanism through the coupling of the gravitational field to both the inflaton and matter fields, without direct inflaton–matter couplings.
Stephon Alexander +3 more
doaj +1 more source
Moduli inflation from modular flavor symmetries
Journal of High Energy Physics, 2023 We study slow-roll inflation model controlled by the modular flavor symmetry. In the model, the modulus field plays a role of inflaton and the introduction of the stabilizer field coupled to a modular form in the superpotential produces the inflaton ...
Yoshihiko Abe +4 more
doaj +1 more source
Supergravity Model of Inflation and Explaining IceCube HESE Data via PeV Dark Matter Decay
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 We construct a unified model of inflation and PeV dark matter with an appropriate choice of no‐scale Kähler potential, superpotential, and gauge kinetic function in terms of MSSM fields and hidden sector Polonyi field. The model is consistent with the CMB observations and can explain the PeV neutrino flux observed at IceCube HESE.
Girish Kumar Chakravarty +3 more
wiley +1 more source
Quintessential inflation [PDF]
, 1998 We present an explicit observationally acceptable model for evolution from inflation to the present epoch under the assumption that the entropy and matter of the familiar universe are from gravitational particle production at the end of inflation.
A. D. Linde +23 more
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