Results 81 to 90 of about 19,573 (204)
Constraints on Gravitation from Causality and Quantum Consistency
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 We examine the role of consistency with causality and quantum mechanics in determining the properties of gravitation. We begin by examining two different classes of interacting theories of massless spin 2 particles—gravitons. One involves coupling the graviton with the lowest number of derivatives to matter, the other involves coupling the graviton ...
Mark P. Hertzberg +1 more
wiley +1 more source
Higgs boson induced reheating and ultraviolet frozen-in dark matter
Journal of High Energy Physics, 2023 A reheating phase in the early universe is an essential part of all inflationary models during which not only the Standard Model (SM) quanta are produced but it can also shed light on the production of dark matter.
Aqeel Ahmed +2 more
doaj +1 more source
Proceedings of 7th Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2020-2021 — PoS(DISCRETE2020-2021), 2022 We discuss a minimal extension of the Standard Model (SM) where a single real scalar field serves as both inflaton and dark matter. The corresponding Lagrangian contains the renormalizable interactions of the inflaton field. Quantum effects generally induce a non-minimal coupling to gravity which facilitates inflation consistent with the PLANCK ...
openaire +3 more sources
Little inflatons and gauge inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2004 25 pages; corrections, references added, discussion modified including consideration of WMAP ...
Kaplan, David E., Weiner, Neal
openaire +2 more sources
Astronomische Nachrichten, Volume 345, Issue 2-3, February-March 2024.Abstract This paper focuses on the implications of a commutative formulation that integrates branch‐cutting cosmology, the Wheeler–DeWitt equation, and Hořava–Lifshitz quantum gravity. Building on a mini‐superspace structure, we explore the impact of an inflaton‐type scalar field on the wave function of the Universe.
Fridolin Weber +8 more
wiley +1 more source
Inhomogeneous Extra Space as a Tool for the Top‐Down Approach
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 The top‐down approach for the 6‐dimensional space has been elaborated. The connection between the cosmological constant and the extra space metric has been obtained. The metric can be found with the necessary accuracy. It is shown that descent from high energies to the low ones leads to the quantum corrections which influence weakly the metric of extra
Sergey G. Rubin, Elias C. Vagenas
wiley +1 more source
Ultra-high frequency gravitational waves from scattering, Bremsstrahlung and decay during reheating
Journal of High Energy PhysicsWe investigate ultra-high frequency gravitational waves (GWs) from gravitons generated during inflationary reheating. Specifically, we study inflaton scattering with its decay product, where the couplings involved in this 2 → 2 scattering are the same as
Yong Xu
doaj +1 more source
Physical Review D, 2006 11 pages, 2 figures. Revised version, accepted for publication in Phys.
Opher, Reuven, Pelinson, Ana
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The branch‐cut quantum gravity with a self‐coupling inflation scalar field: Dynamical equations
Astronomische Nachrichten, Volume 345, Issue 2-3, February-March 2024.Abstract This article focuses on the implications of the recently developed commutative formulation based on branch‐cutting cosmology, the Wheeler–DeWitt equation, and Hořava–Lifshitz quantum gravity. Assuming a mini‐superspace of variables, we explore the impact of an inflaton‐type scalar field ϕ(t)$$ \phi (t) $$ on the dynamical equations that ...
Fridolin Weber +8 more
wiley +1 more source
PRIMORDIAL BLACK HOLE FORMATION FROM INFLATON [PDF]
International Journal of Modern Physics D, 2000 Measurements of the distances to SNe Ia have produced strong evidence that the expansion of the Universe is really accelarating, implying the existence of a nearly uniform component of dark energy with the simplest explanation as a cosmological constant.
Meng, Xinhe, Wang, Bin, Feng, S.
openaire +2 more sources