Recent Results from KamLAND

The Kamioka Liquid-scintillator Anti-Neutrino Detector (KamLAND) has detected for the first time the disappearance of electron antineutrinos from a terrestrial source at the 99.95% C.L. Interpreted in terms of neutrino oscillations, the best fit to the KamLAND data is in excellent agreement with the Large Mixing Angle (LMA) solution to the solar neutrino problem. Assuming CPT invariance, this result excludes other solutions to the solar neutrino problem at > 99.95% C.L. The absence of events with energies between 8 and 15 MeV constrains any electron antineutrino fluxes in this range. In particular, the solar antinuetrino flux is limited to < 2.8 x 10^-4 times the solar B8 neutrino flux at 90% C.L, a factor of 30 improvement over previous limits.
hep group
Last modified: Fri Dec 12 12:12:55 EST 2003