B.D. Dieterle

Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion

We present results of a study of neutrino oscillation based on a 766 ton-year exposure of KamLAND to reactor anti-neutrinos. We observe 258 \nuebar\ candidate events with energies above 3.4 MeV compared to 365.2 events expected in the absence of neutrino oscillation. Accounting for 17.8 expected background events, the statistical significance for reactor \nuebar disappearance is 99.998%. The observed energy spectrum disagrees with the expected spectral shape in the absence of neutrino oscillation at 99.6% significance and prefers the distortion expected from \nuebar oscillation effects. A two-neutrino oscillation analysis of the KamLAND data gives \DeltaMSq = 7.9

Evidence for anti-muon-neutrino ---> anti-electron-neutrino oscillations from the LSND experiment at LAMPF

^{+0.6}_{-0.5}\times10^{-5}

Experimental investigation of geologically produced antineutrinos with KamLAND

eV

High sensitivity search for nu;e's from the sun and other sources at KamLAND.

^2

Search for the Invisible Decay of Neutrons with KamLAND

. A global analysis of data from KamLAND and solar neutrino experiments yields \DeltaMSq = 7.9

Measurement of the reaction [sup 12]C([nu][sub [mu]],[mu][sup [minus]])[ital X] near threshold

^{+0.6}_{-0.5}\times10^{-5}

Evidence for nu_mu -> nu_e Oscillations from Pion Decay in Flight Neutrinos

eV

Evidence for muon-neutrino ---> electron-neutrino oscillations from pion decay in flight neutrinos

^2

A new detector system for double beta decays

and \ThetaParam = 0.40

Differential cross-section for n p elastic scattering in the angular region 50-degrees < Theta* < 180-degrees at 459-MeV

^{+0.10}_{-0.07}