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arXiv · 1309.7957

The charged current neutrino cross section for solar neutrinos, and background to \BBz\ experiments

H. Ejiri·S. R. Elliott
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Abstract

Solar neutrinos can interact with the source isotope in neutrinoless double beta decay experiments through charged current and neutral current interactions. The charged-current product nucleus will then beta decay with a Q-value larger than the double beta decay Q-value. As a result, this process can populate the region of interest and be a background to the double beta decay signal. In this paper we estimate the solar neutrino capture rates on three commonly used double beta decay isotopes, \nuc{76}{Ge}, \nuc{130}{Te}, and \nuc{136}{Xe}. We then use the decay scheme of each product nucleus to estimate the possible background rates in those materials. As half-life sensitivities in future experiments approach $10^{28}$ y, this background will have to be considered.

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H. Ejiri, S. R. Elliott. 2013-09-30. The charged current neutrino cross section for solar neutrinos, and background to \BBz\ experiments. https://doi.org/10.1103/physrevc.89.055501

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