The Mainz Neutrino Mass Experiment

0020784 - ÚJF 2006 RIV NL eng J - Journal Article
Kraus, C. - Bornschein, L. - Bonn, J. - Bornschein, B. - Flatt, B. - Kovalík, Alojz - Müller, B. - Otten, EW - Schall, JP. - Thummler, T. - Weinheimer, C.
The Mainz Neutrino Mass Experiment.
[Mainzský experiment klidové hmotnosti neutrina.]
Nuclear Physics B-Proceedings Supplements. Roč. 143, - (2005), s. 143. ISSN 0920-5632.
[International Conference on Neutrino Physics and Astrophysics /21./. Paříž, 14.06.2004-19.06.2004]
R&D Projects: GA MŠMT 1P04LA213
Institutional research plan: CEZ:AV0Z10480505
Keywords : neutrino mass * tritium beta decay
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 0.875, year: 2005

This paper reports on the improved Mainz experiment on tritium beta spectroscopy which yields a 10 times higher signal to background ratio than before. The main experimental effects and systematic uncertainties have been investigated in side experiments, and possible error sources have been eliminated. Extensive data taking took place in the years 1997 to 2001. A residual analysis of the data sets yields for the square of the electron antineutrino mass the final result of m(2)(nu(e)) = (- 0.6 +/- 2.2(stat) +/- 2.1(syst)) eV(2)/ c(4). We derive an upper limit of m(nu(e)) <= 2.3 eV/c(2) at

V příspěvku jsou uvedeny základní informace o II. fázi Mainzského experimentu měření klidové hmotnosti elektronového antineutrina. Z naměřených dat byla určena horní hranice klidové hmotnosti elektronového antineutrina m(ve)c^2=<2.3 eV na úrovni 95% C.L.
Permanent Link: http://hdl.handle.net/11104/0109838