Results 61 to 70 of about 2,267,527 (201)
Bispectrum from five-dimensional inflation
Journal of High Energy PhysicsIt was proposed that five-dimensional (5D) inflation can blow up the size of a compact dimension from the 5D Planck length to the micron size, as required by the dark dimension proposal, relating the weakness of the actual gravitational force to the size
Ignatios Antoniadis +3 more
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Localization of scalar field on the brane-world by coupling with gravity
Journal of High Energy PhysicsIn this paper, we consider a coupling mechanism between the kinetic term and the gravity, in which a coupling function F (R) is introduced into the kinetic term of the five-dimensional scalar field. Based on this scenario, we investigate the localization
Heng Guo +3 more
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Compact extra dimensions as the source of primordial black holes
Frontiers in Astronomy and Space Sciences, 2022 This article discusses a model of primordial black hole (PBH) formation at the reheating stage. These small/massive black holes appear due to the specific properties of the compact extra dimensions.
Valery V. Nikulin +3 more
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Families as neighbors in extra dimension [PDF]
Physics Letters B, 2000 We propose a new mechanism for explanation of the fermion hierarchy without introducing any family symmetries. Instead, we postulate that different generations live on different branes embedded in a relatively large extra dimension, where the gauge fields can propagate.
Dvali, G., Shifman, M.
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Quasinormal ringing of de Sitter braneworlds
Journal of High Energy PhysicsCompared with the Poincaré braneworld, the de Sitter (dS) braneworld aligns more closely with the present universe characterized by a small but finite cosmological constant.
Hai-Long Jia +3 more
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Dark energy, extra dimensions, and the Swampland
Journal of High Energy Physics, 2020 Perhaps the greatest challenge for fundamental theories based on compactification from extra dimensions is accommodating a period of accelerated cosmological expansion.
Gabriele Montefalcone +2 more
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Non-trivial thick brane realisations with 3-forms
Journal of High Energy PhysicsWe explore the construction of four-dimensional thick branes supported by massless 3-forms in a five-dimensional bulk space. The required residual Poincaré symmetry on the brane is realised as a combination of the bulk symmetries and the internal gauge ...
Bruno J. Barros, Jose Beltrán Jiménez
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Cosmic strings in extra dimensions [PDF]
Physical Review D, 1988 The Einstein equations coupled with a cloud of geometric strings for a five-dimensional Bianchi type-I cosmological model are studied. The cosmological consequences of having strings along the fifth dimension are examined. Particular solutions with dynamical compactifications of the extra dimensions and compatibility with expanding three-dimensional ...
Letelier, Patricio S. +1 more
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Gravitational echoes from braneworlds
Journal of High Energy PhysicsGravitational echoes can be used to probe the structure of spacetime. In this paper, we investigate the gravitational echoes in different braneworld models in five-dimensional spacetime. We derive the gravitational perturbation equations of these models,
Chun-Chun Zhu +3 more
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Higgs bosons in extra dimensions [PDF]
Modern Physics Letters A, 2015 In this paper, motivated by the recent discovery of a Higgs-like boson at the Large Hadron Collider (LHC) with a mass mH≃125 GeV , we review different models where the hierarchy problem is solved by means of a warped extra dimension. In the Randall–Sundrum (RS) model electroweak observables provide very strong bounds on the mass of KK modes which ...
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