A search for neutrino-antineutrino mass inequality by means of sterile neutrino oscillometry

摘要

The investigation of the oscillation pattern induced by the sterile neutrinosmight determine the oscillation parameters, and at the same time, allow toprobe CPT symmetry in the leptonic sector through neutrino-antineutrino massinequality. We propose to use a large scintillation detector like JUNO or LENAto detect electron neutrinos and electron antineutrinos from MCi electroncapture or beta decay sources. Our calculations indicate that such anexperiment is realistic and could be performed in parallel to the currentresearch plans for JUNO and RENO. Requiring at least 5$\sigma$ confidence leveland assuming the values of the oscillation parameters indicated by the currentglobal fit, we would be able to detect neutrino-antineutrino mass inequality ofthe order of 0.5% or larger, which would imply a signal of CPT anomalies.