Direct search for neutrino mass and anomaly in the tritium beta-spectrum: Status of “Troitsk neutrino mass” experiment

• Published in: Nuclear physics. Section B, Proceedings supplement Vol. 91; no. 1; pp. 280 - 286
• Main Authors: Lobashev, V.M, Aseev, V.N, Belesev, A.I, Berlev, A.I, Geraskin, E.V, Golubev, A.A, Kazachenko, O.V, Kuznetsov, Yu.E, Ostroumov, R.P, Rivkis, L.A, Stern, B.E, Titov, N.A, Zadoroghny, C.V, Zakharov, Yu.I
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2001
• ISSN: 0920-5632; 1873-3832
• DOI: 10.1016/S0920-5632(00)00952-X

Results of the “Troitsk ν-mass” experiment on search for the neutrino rest mass in the tritium beta-decay are presented. New data on the time dependence of the anomalous, bump-like structure at the end of the beta spectrum reported earlier are discussed. Possible systematics is considered in view of contradiction of “Troitsk nu-mass” observation with those of “Mainz neutrino” set-up. An upper limit for electron antineutrino rest mass remains at m ν < 2.5eV c 2 at 95% C.L.