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Testing the Gallium Anomaly

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arxiv 2209.02885 v3 pith:YKO5QDQG submitted 2022-09-07 hep-ph hep-exnucl-ex

Testing the Gallium Anomaly

classification hep-ph hep-exnucl-ex
keywords galliumcaptureeventsanomalydetectionelectronindependentlight
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the online detection by gallium capture of mono-energetic neutrinos produced by a $^{51}$Cr radioactive source in a scintillation experiment. We find that cerium-doped gadolinium aluminum gallium garnet (GAGG) is a suitable scintillator which contains about 21% of gallium per weight and has a high mass density and light yield. Combined with a highly efficient light detection system this allows tagging of the subsequent germanium decay and thus a clean distinction of gallium capture and elastic neutrino electron scattering events. With 1.5 tons of scintillator and 10 source runs of 3.4MCi, each, we obtain about 760 gallium capture events with a purity of 85% and 680,000 neutrino electron scattering events, where the latter provide a precise normalization independent of any nuclear physics. This configuration would allow to test the gallium anomaly at more than $5\sigma$ in an independent way.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A possible solution to the gallium anomaly moving beyond the leptonic wave function factorization

    hep-ph 2025-12 conditional novelty 6.0

    A non-factorized amplitude treatment with a fitted sign-changing nuclear transition density reduces the predicted νe-71Ga capture rate by ~20%, absorbing the gallium anomaly without new physics.