Abstract
The KamLAND experiment has determined a precise value for the neutrino oscillation parameter and stringent constraints on . The exposure to nuclear reactor antineutrinos is increased almost fourfold over previous results to due to longer livetime and an enlarged fiducial volume. An undistorted reactor energy spectrum is now rejected at . Analysis of the reactor spectrum above the inverse beta decay energy threshold, and including geoneutrinos, gives a best fit at and . Local minima at higher and lower are disfavored at . Combining with solar neutrino data, we obtain and .
- Received 29 January 2008
- Publisher error corrected 10 December 2008
DOI:https://doi.org/10.1103/PhysRevLett.100.221803
©2008 American Physical Society
Corrections
10 December 2008