Results of the troitsk experiment on the search for the electron antineutrino rest mass in tritium beta-decay

Abstract The end-point region of the β-spectrum of tritium has been measured with an integral electrostatic spectrometer with adiabatic magnetic collimation and gaseous tritium source. The search for the neutrino rest mass has resulted in m ν 2 = − 22 ± 4.8 eV 2 / c 4 . It is shown that the negative m ν 2 effect may be explained by the local enhancement in the region 7–15 eV below the end point with an integral B.R. of about 10 −10 . After accounting for this anomaly one is able to deduce that m ν