Probing the Early Universe

A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Cosmology".

Deadline for manuscript submissions: 30 May 2024 | Viewed by 572

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Art and Design, Faculty of Technology, Oslo and Akershus University College of Applied Sciences, P.O. Box 4 St., Olavs Plass, NO-0130 Oslo, Norway
Interests: cosmology; early universe; inflation; general theory of relativity; electromagnetism of uniformly accelerated charges; conceptual understanding of general relativity

Special Issue Information

Dear Colleagues,

We will here give a wide definition of the concept “Early Universe”. Therefore, we will include not only the first moments, such as the inflationary era lasting about 10-33 s, the time when the asymmetry between matter and antimatter appeared, the first ten minutes with cosmic nucleosynthesis, and the time about 380,000 years later when the universe became transparent for the radiation which now makes up the cosmic microwave background, but also the time afterward up to one billion years after the inflationary era, when the first stars and galaxies appeared, and the reionization of the cosmic matter happened. New observational results obtained for example by means of the James Webb Telescope are welcome. We want to invite you to contribute a scientific article with new results or a review article to this Special Issue.

Prof. Dr. Øyvind Grøn
Guest Editor

Manuscript Submission Information

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Keywords

  • the Planck era (t < 10-43 s)
  • grand unification era (t < 10-36 s)
  • the inflationary era (t < 10-33 s)
  • electroweak epoch (10-33 s < t < 10-12 s)
  • quark era (10-12 s < t < 10-5 s)
  • hadron era (10-5 s < t < 1 s)
  • lepton era with neutrino decoupling (1 s < t < 10 s)
  • cosmic nucleosynthesis (10 s < t < 1000 s)
  • radiation dominated and ‘foggy’ era (1000 s < t < 380,000 years)
  • recombination (18,000 years < t < 380,000 years)
  • the dark era (380,000 years < t < 150 million years)
  • first stars and galaxies (200 to 400 million years)
  • cosmic reionization (200 million to 1 billion years)

Published Papers (1 paper)

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Research

23 pages, 603 KiB  
Article
PeV-Scale SUSY and Cosmic Strings from F-Term Hybrid Inflation
by Constantinos Pallis
Universe 2024, 10(5), 211; https://doi.org/10.3390/universe10050211 - 8 May 2024
Cited by 4 | Viewed by 319
Abstract
We consider F-term hybrid inflation (FHI) and SUSY breaking in the context of a BL extension of the MSSM that largely respects a global U(1)R symmetry. The hidden sector Kaehler manifold enjoys an enhanced [...] Read more.
We consider F-term hybrid inflation (FHI) and SUSY breaking in the context of a BL extension of the MSSM that largely respects a global U(1)R symmetry. The hidden sector Kaehler manifold enjoys an enhanced SU(1,1)/U(1) symmetry, with the scalar curvature determined by the achievement of a SUSY-breaking de Sitter vacuum without undesirable tuning. FHI turns out to be consistent with the data, provided that the magnitude of the emergent soft tadpole term is confined to the range (1.2100) TeV, and it is accompanied by the production of BL cosmic strings. If these are metastable, they are consistent with the present observations from PTA experiments on the stochastic background of gravitational waves with dimensionless tension Gμcs(19.2)·108. The μ parameter of the MSSM arises by appropriately adapting the Giudice–Masiero mechanism and facilitates the out-of-equilibrium decay of the R saxion at a reheat temperature lower than about 71 GeV. Due to the prolonged matter-dominated era, the gravitational wave signal is suppressed at high frequencies. The SUSY mass scale turns out to lie in the PeV region. Full article
(This article belongs to the Special Issue Probing the Early Universe)
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