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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.
We analyse the possibility of detecting visible photons from a hypothetical radiative decay of solar neutrinos. Our study is focused on the simulation of such measurements during total solar eclipses and it is based on the BP2000 Standard Solar Model and on the most recent experimental information concerning the neutrino properties. Our calculations yield the probabilities of the decays, the shapes...
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