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arXiv · 1211.7193

An upper limit on additional neutrino mass eigenstate in 2 to 100 eV region from "Troitsk nu-mass" data

A. I. Belesev·A. I. Berlev·E. V. Geraskin·A. A. Golubev·N. A. Likhovid·A. A. Nozik·V. S. Pantuev·V. I. Parfenov·A. K. Skasyrskaya
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Abstract

We performed a search for any sign of an additional neutrino mass state in beta-electron spectrum based on data reanalysis of direct electron antineutrino mass measurements in Tritium beta-decay in the Troitsk nu-mass experiment. The existing data set allows us to search for such a state in the mass range up to 100 eV. The lowest value at a 95% C.L. upper limit for the contribution of a heavy eigenstate into electron neutrino is around or less than 1% for masses above 20 eV.

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A. I. Belesev, A. I. Berlev, E. V. Geraskin, A. A. Golubev, N. A. Likhovid, A. A. Nozik, V. S. Pantuev, V. I. Parfenov, A. K. Skasyrskaya. 2012-11-30. An upper limit on additional neutrino mass eigenstate in 2 to 100 eV region from "Troitsk nu-mass" data. https://doi.org/10.1134/s0021364013020033

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