Search for neutrino radiative decay with a prototype Borexino detector |
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Authors: | A. V. Derbin O. Ju. Smirnov |
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Affiliation: | (1) St. Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, Leningrad region, 188350, Russia;(2) Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia |
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Abstract: | Results of background measurements with a prototype of the Borexino detector were used to obtain bounds on the lifetime of radiative neutrino decay νH→νL+γ. The new lower limit for the lifetime of pp and 7Be neutrinos is τc.m.(νH→νL+γ) /mν≥4.2×103 s eV?1(α)= 0). It is more than an order of magnitude stronger than the value obtained in previous experiments using nuclear reactors and accelerators. |
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