New constraints on neutrino masses from cosmology

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By combining data from cosmic microwave background (CMB) experiments (including the recent WMAP third year results), large scale structure (LSS) and Lyman-{alpha} forest observations, we derive upper limits on the sum of neutrino masses of {summation}m{sub v} < 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 the sterile neutrino to m{sub s} < 0.26eV at 95% c.l.. These results exclude at high significance the sterile neutrino hypothesis as an explanation of the LSND anomaly. We then generalize the analysis ... continued below

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5 pages

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Melchiorri, A.; Serra, P.; /Rome U. /INFN, Rome; Dodelson, S.; /Fermilab; Slosar, A. et al. January 1, 2006.

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By combining data from cosmic microwave background (CMB) experiments (including the recent WMAP third year results), large scale structure (LSS) and Lyman-{alpha} forest observations, we derive upper limits on the sum of neutrino masses of {summation}m{sub v} < 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 the sterile neutrino to m{sub s} < 0.26eV at 95% c.l.. These results exclude at high significance the sterile neutrino hypothesis as an explanation of the LSND anomaly. We then generalize the analysis to account for active neutrino masses which tightens the limit to m{sub s} < 0.23eV and the possibility that the sterile abundance is not thermal. In the latter case, the constraints in the (mass, density) plane are nontrivial. For a mass of > 1eV or < 0.05eV the cosmological energy density in sterile neutrinos is always constrained to be {omega}{sub v} < 0.003 at 95% c.l.. However, for a sterile neutrino mass of {omega}{sub v} 0.25eV, {omega}{sub v} can be as large as 0.01.

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5 pages

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  • Journal Name: New Astron.Rev.50:1020-1024,2006; Journal Volume: 50

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  • Report No.: FERMILAB-PUB-07-049-A
  • Grant Number: AC02-07CH11359
  • DOI: 10.1016/j.newar.2006.09.020 | External Link
  • Office of Scientific & Technical Information Report Number: 899997
  • Archival Resource Key: ark:/67531/metadc885213

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 7, 2016, 6:14 p.m.

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Melchiorri, A.; Serra, P.; /Rome U. /INFN, Rome; Dodelson, S.; /Fermilab; Slosar, A. et al. New constraints on neutrino masses from cosmology, article, January 1, 2006; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc885213/: accessed January 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.