An upper limit on electron antineutrino mass from Troitsk experiment
Aug, 2011Citations per year
Abstract: (arXiv)
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.Note:
- 9 pages, 6 figures and 1 table
- 14.60.Lm
- 14.60.Pq
- 23.40.-s
- antineutrino/e: mass: upper limit
- electron: spectrometer
- tritium: semileptonic decay
- statistics: Bayesian
- data analysis method
- electron: energy spectrum
- experimental results
References(11)
Figures(6)