Upper limit on the electron antineutrino mass from the Troitsk experiment

Abstract

An electron antineutrino mass has been measured in tritium β-decay in the Troitsk ν-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 m 2 ν = −0.67 ± 2.53 eV 2 . This gives an experimental upper sensitivity limit of mν < 2.2 eV , 95% C . L. and upper limit estimates mν < 2.12 eV , 95% C .L. for Bayesian statistics and mν < 2.05 eV , 95% C .L. for the Feldman and Cousins approach.

Predictions for neutrinoless double-beta decay in the 3+1 sterile neutrino scenario

“…[22]), which is still unknown, up to the upper bound of about 2 eV at 95% C.L. established by the Mainz [23] and Troitsk [24] Tritium β-decay experiments.…”

Combining Planck data with large scale structure information gives a strong neutrino mass constraint

“…The Heidelberg-Moscow experiment has limited the mass of the electron neutrino to be less than 0.35 eV (90% confidence level) for Majorana neutrinos using neutrinoless double β decay [13], but does not require the neutrinos to be massive. The general bound from tritium β decay requires that the mass of the electron neutrino is less than 2 eV [14]. No current experiment has sufficient sensitivity to measure the absolute neutrino mass.…”

Katrin

“…They placed similar limits on the neutrino mass: m β ν < 2.3 eV [4,5]. A more recent analysis of the Troitsk data lowered that limit to m β ν < 2.1 eV [6].…”