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The data collected during the 2006 total solar eclipse are analyzed in the search for signals produced by a hypothetical radiative decay of heavy neutrinos. In the absence of the expected light pattern, we extract lower limits for the heavy neutrino components proper lifetime. The present analysis restricts to the direct hierarchy hypothesis (m 3 ≫m 2 >m 1 ). The quality...
We present the results of the observations performed in the occasion of the 21st June 2001 total solar eclipse, looking for visible photons emitted through a possible radiative decay of solar neutrinos. We establish lower limits for the ν 2 or ν 3 proper lifetimes τ 0 /m>=10 3 s/eV, for neutrino masses larger than 10 -2 eV.
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