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 $\sim 10$ eV nuclear recoil energy threshold and 50 kg-yr exposure. The pep flux can be detected with $\sim 3$ 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 $\sim$ eV and only $\sim$ 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.

4 pages, 2 figure panels

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• CNO Solar Neutrinos in Next-Generation Dark Matter Experiments
• Digging for Dark Matter: Spectral Analysis and Discovery Potential of Paleo-Detectors
• CNO Neutrino Grand Prix: The race to solve the solar metallicity problem
• Reducing the Solar Neutrino Background Using Polarised Helium-3
• The CMSSM Survives Planck, the LHC, LUX-ZEPLIN, Fermi-LAT, H.E.S.S. and IceCube
• CYG$\nu$S: Detecting solar neutrinos with directional gas time projection chambers