Limit on ν¯e mass from observation of the β decay of molecular tritium
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ID: 268082
1991
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Abstract
We report the most sensitive direct upper limit set on the mass ${\mathit{m}}_{\ensuremath{\nu}}$ of the electron antineutrino. Our measurements of the shape of the \ensuremath{\beta} decay spectrum of free molecular tritium yield, under the assumption of no new physics other than that of mass, a central value for ${\mathit{m}}_{\ensuremath{\nu}}^{2}$ of -147\ifmmode\pm\else\textpm\fi{}68\ifmmode\pm\else\textpm\fi{}41 ${\mathrm{eV}}^{2}$, which corresponds to an upper limit of 9.3 eV (95% confidence level) on ${\mathit{m}}_{\ensuremath{\nu}}$. The result is in clear disagreement with a reported value of 26(5) eV.
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robertson1991physicallimit
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| Authors | R. G. H. Robertson;T. J. Bowles;G. J. Stephenson, Jr;D. L. Wark;J. F. Wilkerson;D. A. Knapp; |
| Journal | physical review letters |
| Year | 1991 |
| DOI |
doi:10.1103/PhysRevLett.67.957
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