Light neutrinos as cosmological dark matter. A crucial experimental test

Details Light neutrinos as cosmological dark matter. A crucial experimental test Light neutrinos as cosmological dark matter. A crucial experimental test

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phlb..216..413h&link_type=abstract

Physics Letters B, Volume 216, Issue 3-4, p. 413-418.

Physics

30

Scientific paper

Cosmological dark matter allegedly dominates the energy of the universe. Among all dark matter candidates, the light neutrino is the only particle actually known to exist in nature. The most likely light neutrino candidate is vτ with mass m(vτ) ~= 15-65 eV. The only practical way to show that m(vτ) is in that range, is to search for vμ-vτ oscillations reaching values of sin22θτμ as low as 4×10-4. This calls for an improvement of the best existing experiment by one order of magnitude. A dedicated accelerator experiment with an emulsion followed by a spectrometer, detecting at least 40000 neutrino interactions, can settle the issue. Such an experiment does not seem impossible. A positive result would prove that most of the universe consists of vτ particles.

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