Cosmology seeking friendship with sterile neutrinos

Details Cosmology seeking friendship with sterile neutrinos Cosmology seeking friendship with sterile neutrinos

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011nuphs.217...72h&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 217, Issue 1, p. 72-74.

Physics

Nuclear Physics

1

Scientific paper

Precision cosmology and big-bang nucleosynthesis mildly favour extra radiation in the universe beyond photons and ordinary neutrinos, lending support to the existence of low-mass sterile neutrinos. We present bounds on the common mass scale ms and effective number Ns of thermally excited sterile neutrino states from the most recent cosmological data. Our results are compatible with the existence of one or perhaps two sterile neutrinos, as suggested by LSND and MiniBooNE, if ms is in the sub-eV range.

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