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- W2187885613 abstract "Aims. We aim to constrain mass-varying neutrino models using large scale structure observations and produce forecast for the Euclid survey. Methods. We investigate two models with different scalar field potential and both positive and negative coupling parameters β .T hese parameters correspond to growing or decreasing neutrino mass, respectively. We explore couplings up to |β| 5. Results. In the case of the exponential potential, we find an upper limit on Ωνh 2 3f or the growing neutrino mass and β< −1.5 for the decreasing mass case. This is a clear sign for a preference of higher couplings. When including a prior on the present neutrino mass the upper limit on the coupling becomes |β| < 3a t 2σ level for the exponential potential. Finally, we present a Fisher forecast using the tomographic weak lensing from an Euclid-like experiment and we also consider the combination with the cosmic microwave background (CMB) temperature and polarisation spectra from a Planck-like mission. If considered alone, lensing data is more efficient in constraining Ων with respect to CMB data alone. There is, however, a strong degeneracy in the β-Ωνh 2 plane. When the two data sets are combined, the latter degeneracy remains, but the errors are reduced by a factor ∼2 for both parameters." @default.
- W2187885613 created "2016-06-24" @default.
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- W2187885613 date "2013-01-01" @default.
- W2187885613 modified "2023-09-27" @default.
- W2187885613 title "Mass-varying neutrino in light of cosmic microwave background and weak lensing (Research Note)" @default.
- W2187885613 hasPublicationYear "2013" @default.
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