Abstract
KamLAND has measured the flux of ’s from distant nuclear reactors. We find fewer events than expected from standard assumptions about propagation at the 99.95% C.L. In a exposure the ratio of the observed inverse -decay events to the expected number without disappearance is for energies . In the context of two-flavor neutrino oscillations with CPT invariance, all solutions to the solar neutrino problem except for the “large mixing angle” region are excluded.
- Received 6 December 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.021802
©2003 American Physical Society