Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods

Shouvik Roy Choudhury; Steen Hannestad

doi:10.1088/1475-7516/2020/07/037

paper

Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods

arXiv:1907.12598 · doi:10.1088/1475-7516/2020/07/037

Abstract

In this work we update the bounds on $\sum m_{ν}$ from latest publicly available cosmological data and likelihoods using Bayesian analysis, while explicitly considering particular neutrino mass hierarchies. In the minimal $Λ CDM + \sum m_{ν}$ model with most recent CMB data from Planck 2018 TT,TE,EE, lowE, and lensing; and BAO data from BOSS DR12, MGS, and 6dFGS, we find that at 95\% C.L. the bounds are: $\sum m_{ν} < 0.12$ eV (degenerate), $\sum m_{ν} < 0.15$ eV (normal), $\sum m_{ν} < 0.17$ eV (inverted). The bounds vary across the different mass orderings due to different priors on $\sum m_{ν}$ . Also, we find that the normal hierarchy is very mildly preferred relative to the inverted, using both minimum $χ^{2}$ values and Bayesian Evidence ratios. In this paper we also provide bounds on $\sum m_{ν}$ considering different hierarchies in various extended cosmological models: $Λ CDM + \sum m_{ν} + r$ , $w CDM + \sum m_{ν}$ , $w_{0} w_{a} CDM + \sum m_{ν}$ , $w_{0} w_{a} CDM + \sum m_{ν}$ with $w (z) \geq - 1$ , $Λ CDM + \sum m_{ν} + Ω_{k}$ , and $Λ CDM + \sum m_{ν} + A_{Lens}$ . We do not find any strong evidence of normal hierarchy over inverted hierarchy in the extended models either.

arXiv comment27 pages, 6 figures. Matches the published version

Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods

Abstract

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