Strengthening the bound on the mass of the lightest neutrino with terrestrial and cosmological experiments

Abstract

We determine the upper limit on the mass of the lightest neutrino from the most robust recent cosmological and terrestrial data. Marginalizing over possible effective relativistic degrees of freedom at early times ($N_{\mathrm{eff}}$) and assuming normal mass ordering, the mass of the lightest neutrino is less than 0.037 eV at 95% confidence; with inverted ordering, the bound is 0.042 eV. These results improve upon the strength and robustness of other recent limits and constrain the mass of the lightest neutrino to be barely larger than the largest mass splitting. We show the impacts of realistic mass models, and different sources of $N_{\mathrm{eff}}$.

5 pages, 2 figures + Appendix. Full dataset available at https://doi.org/10.5281/zenodo.4005381 (v3: Matches version published in PRD)

References in corpus (17)

• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• 2020 Global reassessment of the neutrino oscillation picture
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Solar neutrino measurements in Super-Kamiokande-II
• Relic neutrino decoupling with flavour oscillations revisited
• Neutrino decoupling including flavour oscillations and primordial nucleosynthesis
• A precision calculation of relic neutrino decoupling
• Determining neutrino oscillation parameters from atmospheric muon neutrino disappearance with three years of IceCube DeepCore data
• Neutrino cosmology and Planck
• Improved Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay
• On the assumption of Gaussianity for cosmological two-point statistics and parameter dependent covariance matrices
• Cosmological Forecasts for Combined and Next Generation Peculiar Velocity Surveys
• Measuring the 2D Baryon Acoustic Oscillation signal of galaxies in WiggleZ: Cosmological constraints
• CosmoBit: A GAMBIT module for computing cosmological observables and likelihoods

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