Time-varying neutrino mass from a supercooled phase transition: Current cosmological constraints and impact on the Ωm−σ8 plane

@article{Lorenz2019TimevaryingNM,
  title={Time-varying neutrino mass from a supercooled phase transition: Current cosmological constraints and impact on the 
$\Omega$m−$\sigma$8
 plane},
  author={Ch. Lorenz and Lena Funcke and Erminia Calabrese and Steen Hannestad},
  journal={Physical Review D},
  year={2019}
}
In this paper we investigate a time-varying neutrino mass model, motivated by the mild tension between cosmic microwave background (CMB) measurements of the matter fluctuations and those obtained from low-redshift data. We modify the minimal case of the model proposed by [G. Dvali and L. Funcke, Phys. Rev. D 93, 113002 (2016)] that predicts late neutrino mass generation in a postrecombination cosmic phase transition, by assuming that neutrino asymmetries allow for the presence of relic… 

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TLDR
Current measurements of the low and high redshift Universe are in tension if the authors restrict ourselves to the standard six-parameter model of flat ΛCDM, and an eV-scale sterile neutrino mass--of interest for short baseline and reactor anomalies--is well within the allowed range.
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