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Träfflista för sökning "WFRF:(Kane Gordon) srt2:(2020)"

Sökning: WFRF:(Kane Gordon) > (2020)

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1.
  • Kane, Gordon, et al. (författare)
  • Baryogenesis from a modulus dominated universe
  • 2020
  • Ingår i: Journal of Cosmology and Astroparticle Physics. - : IOP Publishing. - 1475-7516. ; :02
  • Tidskriftsartikel (refereegranskat)abstract
    • String/ M-theory compactifications predict the existence of a modulus field with a mass of 100-10000TeV. Its decay at MeV-temperatures generates large amounts of entropy and washes out any previously produced baryon asymmetry. We describe how the baryon asymmetry can be (re)generated by the modulus decay. The mechanism relates the smallness of the asymmetry to the hierarchy between the Planck- and the Fermi-scale.
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2.
  • Lattanzi, Massimiliano, et al. (författare)
  • Cornering (quasi) degenerate neutrinos with cosmology
  • 2020
  • Ingår i: Journal of High Energy Physics (JHEP). - 1126-6708 .- 1029-8479. ; :10
  • Tidskriftsartikel (refereegranskat)abstract
    • In light of the improved sensitivities of cosmological observations, we examine the status of quasi-degenerate neutrino mass scenarios. Within the simplest extension of the standard cosmological model with massive neutrinos, we find that quasi-degenerate neutrinos are severely constrained by present cosmological data and neutrino oscillation experiments. We find that Planck 2018 observations of cosmic microwave background (CMB) anisotropies disfavour quasi-degenerate neutrino masses at 2.4 Gaussian sigma 's, while adding baryon acoustic oscillations (BAO) data brings the rejection to 5.9 sigma 's. The highest statistical significance with which one would be able to rule out quasi-degeneracy would arise if the sum of neutrino masses is Sigma m(v) = 60 meV (the minimum allowed by neutrino oscillation experiments); indeed a sensitivity of 15 meV, as expected from a combination of future cosmological probes, would further improve the rejection level up to 17 sigma. We discuss the robustness of these projections with respect to assumptions on the underlying cosmological model, and also compare them with bounds from beta decay endpoint and neutrinoless double beta decay studies.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Kane, Gordon (2)
Gerbino, Martina (1)
Valle, José W.F. (1)
Freese, Katherine (1)
Winkler, Martin Wolf ... (1)
Lattanzi, Massimilia ... (1)
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Stockholms universitet (2)
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Engelska (2)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (2)
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2020 (2)Ta bort avgränsningen

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