Sub-eV upper limits on neutrino masses from cosmology
نویسندگان
چکیده
منابع مشابه
Upper limits on neutrino masses from cosmology
The latest results from the WMAP satellite [1] confirm the success of the ΛCDM model, where ∼ 75 % of the mass-energy density is in the form of dark energy, with matter, most of it in the form of cold dark matter (CDM) making up the remaining 25 % . Neutrinos with masses on the eV scale or below will be a hot component of the dark matter and will free-stream out of overdensities and thus wipe o...
متن کاملInferred 4 . 4 eV Upper Limits on the Muon - and Tau - Neutrino Masses
By combining experimental constraints from atmospheric and solar neutrino oscillations and the tritium beta decay endpoint, we infer upper limits of 4.4 eV on the νμ and ντ masses, if the universe consists of three neutrinos. For hierarchical mass spectra m3 ≫ m1,m2 or m3 ≃ m2 ≫ m1 we infer that mνα < ∼ 0.08 eV for α = e, μ, τ . In a four neutrino universe, and assuming neutrino oscillations al...
متن کاملNew Constraints on Neutrino Masses from Cosmology
By combining data from cosmic microwave background (CMB) experiments (including the recent WMAP third year results), large scale structure (LSS) and Lymanα forest observations, we derive upper limits on the sum of neutrino masses of Σmν < 0.17eV at 95% c.l.. We then constrain the hypothesis of a fourth, sterile, massive neutrino. For the 3 massless + 1 massive neutrino case we bound the mass of...
متن کاملUpper bound of 0.28 eV on neutrino masses from the largest photometric redshift survey.
We present a new limit of ∑m(v) ≤ 0.28 (95% CL) on the sum of the neutrino masses assuming a flat ΛCDM cosmology. This relaxes slightly to ∑m(ν) ≤ 0.34 and ∑m(v) ≤ 0.47 when quasinonlinear scales are removed and w≠ -1, respectively. These are derived from a new photometric catalogue of over 700,000 luminous red galaxies (MegaZ DR7) with a volume of 3.3 (Gpc h(-1))(3) and redshift range 0.45 < ...
متن کاملNeutrino masses and cosmology
Cosmology can provide information on the absolute scale of neutrino masses, complementary to the results of tritium beta decay and neutrinoless double beta decay experiments. We show how the analysis of data on cosmological observables, such as the anisotropies of the cosmic microwave background or the distribution of large-scale structure, combined with other experimental results, provides an ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica Scripta
سال: 2006
ISSN: 0031-8949,1402-4896
DOI: 10.1088/0031-8949/2006/t127/036