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

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

2011-01-18

arxiv.org/abs/1101.3413v2

Phys.Rev.C83:045502,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

10.1103/PhysRevC.83.045502

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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