Electron Antineutrino Disappearance at KamLAND and JUNO as Decisive Tests of the Short Baseline Anti-nuₘu to Anti-nuₑ Appearance Anomaly

Original · EN

The IsoDAR antineutrino source, which produces a flux from 8Li isotope decay at rest, when paired with the proposed JUNO (Jiangmen Underground Neutrino Observatory) detector, has unprecedented sensitivity to anti-nuₑ disappearance for oscillations at high Delta m². Assuming CPT invariance, the sensitive region for anti-nuₑ disappearance can be used to restrict the allowed parameter space of an anti-nuₘu to anti-nuₑ appearance signal. The 5 sigma sensitivity of this experiment covers the entire anti-nuₘu to anti-nuₑ allowed parameter space from a combined fit to short-baseline experiments. This represents a decisive test of the LSND and MiniBooNE antineutrino appearance signals within all models that are CPT invariant. Running IsoDAR at KamLAND restricts a large part of the appearance signal region in a similar way.