Abstract
An electron antineutrino mass has been measured in tritium decay in the Troitsk -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 reanalyzed. A thorough selection of data with the reliable experimental conditions has been performed. We checked every known systematic effect and obtained the following experimental estimate for neutrino mass squared . This gives an experimental upper sensitivity limit of , 95% C.L. and upper limit estimates , 95% C.L. for Bayesian statistics and , 95% C.L. for the Feldman and Cousins approach.
- Received 29 August 2011
DOI:https://doi.org/10.1103/PhysRevD.84.112003
© 2011 American Physical Society