Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-08-25
Phys. Rev. D 84 (2011) 112003
Physics
High Energy Physics
High Energy Physics - Experiment
9 pages, 6 figures and 1 table
Scientific paper
An electron antineutrino mass has been measured in tritium beta-decay in the "Troitsk nu-mass" experiment. The setup consists of a windowless gaseous tritium source and an electrostatic electron spectrometer. The whole data set acquired from 1994 to 2004 was reanalysed. A thorough selection of data with the reliable experimental conditions has been performed. We checked every known systematic effect and got the following experimental estimate for neutrino mass squared m_{nu}^{2}=-0.67+/- 2.53 {eV}^{2}. This gives an experimental upper sensitivity limit of m_{nu}<2.2 eV and upper limit estimates m_{nu}<2.12 eV, 95% C.L. for Bayesian statistics and m_{nu}<2.05 eV, 95% C.L. for the Feldman and Cousins approach.
Aseev V. N.
Belesev A. I.
Berlev A. I.
Geraskin E. V.
Golubev Alexander
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