The neutrino floor at ultra-low threshold
Abstract
By lowering their energy threshold direct dark matter searches can reach the neutrino floor with experimental technology now in development. The 7Be flux can be detected with 10 eV nuclear recoil energy threshold and 50 kg-yr exposure. The pep flux can be detected with 3 ton-yr exposure, and the first detection of the CNO flux is possible with similar exposure. The pp flux can be detected with threshold of eV and only kg-yr exposure. These can be the first pure neutral current measurements of the low-energy solar neutrino flux. Measuring this flux is important for low mass dark matter searches and for understanding the solar interior.
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