Can four neutrinos explain global oscillation data including LSND and cosmology?

Details Can four neutrinos explain global oscillation data including LSND and cosmology? Can four neutrinos explain global oscillation data including LSND and cosmology?

2003-05-28

arxiv.org/abs/hep-ph/0305312v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given by T.S. at the NOON 2003 workshop, February 10-14, 2003, Kanazawa, Japan, 10 pages, 5 figures

Scientific paper

We present an analysis of the global neutrino oscillation data in terms of four-neutrino mass schemes. We find that the strong preference of oscillations into active neutrinos implied by solar+KamLAND as well as atmospheric neutrino data allows to rule out (2+2) mass schemes, whereas (3+1) schemes are strongly disfavoured by short-baseline experiments. In addition, we perform an analysis using recent data from cosmology, including CMB data from WMAP and data from 2dFGRS large scale structure surveys. These data lead to further restrictions of the allowed regions for the (3+1) mass scheme.

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