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arXiv · 1101.3413

The absolute mass of neutrino and the first unique forbidden beta-decay of 187Re

Rastislav Dvornicky·Kazuo Muto·Fedor Simkovic·Amand Faessler
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Abstract

The planned rhenium beta-decay experiment MARE might probe the absolute mass scale of neutrinos with the same sensitivity as the tritium beta-decay experiment KATRIN, which will start data taking in 2011 and will proceed for five years. We present the energy distribution of emitted electrons for the first unique forbidden beta-decay of 187Re. It is found that the p-wave emission of electron dominates over the s-wave. By assuming mixing of three neutrinos the Kurie function for the rhenium beta-decay is derived. It is shown that the Kurie plot near the endpoint is within a good accuracy linear in the limit of massless neutrinos like the Kurie plot of the superallowed beta-decay of 3H.

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Rastislav Dvornicky, Kazuo Muto, Fedor Simkovic, Amand Faessler. 2011-01-18. The absolute mass of neutrino and the first unique forbidden beta-decay of 187Re. https://doi.org/10.1103/physrevc.83.045502

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