Can Long-Baseline Neutrino Oscillation Experiments Tell Us about Neutrino Dark Matter?

Details Can Long-Baseline Neutrino Oscillation Experiments Tell Us about Neutrino Dark Matter? Can Long-Baseline Neutrino Oscillation Experiments Tell Us about Neutrino Dark Matter?

1997-01-24

arxiv.org/abs/hep-ph/9701362v1

Astropart.Phys.8:193-200,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, revtex, 5 postscript figures

Scientific paper

10.1016/S0927-6505(97)00056-X

We define the ratio R = (No. of observed electron events)/ (No. of expected muon events - No. of observed muon events) as a measure for relative importance of $\nu_\mu \to \nu_e$ and $\nu_\mu \to \nu_\tau$ oscillations which will be measurable in coming long-baseline neutrino experiments. We then argue that if neutrino oscillation is observed with 0.02 < R < 0.87 it implies the rejection of the neutrino dark matter hypothesis. Our argument is valid if neutrinos come with only three flavors without steriles and if they have a hierarchical mass pattern.

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