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arXiv · 2302.10460

How to measure the reactor neutrino flux below the inverse beta decay threshold with CE$\nu$NS

Jiajun Liao·Hongkai Liu·Danny Marfatia
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Abstract

Most antineutrinos produced in a nuclear reactor have energies below the inverse beta decay threshold, and have not yet been detected. We show that a coherent elastic neutrino-nucleus scattering experiment with an ultra-low energy threshold like NUCLEUS can measure the flux of reactor neutrinos below 1.8 MeV. Using a regularized unfolding procedure, we find that a meaningful upper bound can be placed on the low energy flux, but the existence of the neutron capture component cannot be established.

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Jiajun Liao, Hongkai Liu, Danny Marfatia. 2023-02-21. How to measure the reactor neutrino flux below the inverse beta decay threshold with CE$\nu$NS. https://doi.org/10.1103/physrevd.108.033002

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