In the framework of the standard cosmological model, large-scale structure observations imply neutrino mass limits in the range ∑m_v < 0.7-2.1 eV (95% CL), depending on the included data sets and assumed priors on cosmological parameters. Future observations will further improve these sensitivities. The measured neutrino oscillation parameters in conjunction with the big-bang nucleosynthesis constraint on the primoridal v_e chemical potential exclude a significant deviation from the standard cosmological neutrino density. Therefore, large-scale structure limits on the hot dark matter fraction indeed translate directly into neutrino mass limits. While neutrinos with sub-eV masses are almost negligible for the cosmic dark matter inventory, they fit nicely with leptogenesis scenarios for creating the baryon asymmetry of the universe.
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