Volume 532, August 2011
|Number of page(s)||5|
|Section||Cosmology (including clusters of galaxies)|
|Published online||22 July 2011|
Reactor sterile neutrinos, dark energy, and the age of the universe
Institute of theoretical astrophysics, University of Oslo, Box 1029, 0315 Oslo, Norway
Received: 5 April 2011
Accepted: 7 May 2011
There are indications that the neutrino oscillation data from reactor experiments and the LSND and MiniBooNE experiments show a preference for two sterile neutrino species, both with masses in the eV region. We show that this result has a significant impact on some important cosmological parameters. Specifically, we use a combination of CMB, LSS, and SN1A data and show that the existence of two light, sterile neutrinos would rule out the cosmological constant as dark energy at a 95% confidence level and lower the expansion age of the universe to 12.58 ± 0.26 Gyr.
Key words: cosmological parameters / dark matter / dark energy / Elementary particles / Neutrinos
© ESO, 2011
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