The result on the neutrino oscillation from K2K
Tsuyoshi Nakaya
Kyoto U.

Abstract
The K2K is the first long baseline neutrino oscillation experiment to confirm the evidence of neutrino oscillation discovered in Super-Kaimokande atmospheric neutrino events. By using data collected from 1999 to 2001, K2K confirm the neutrino oscillation with more than 99% probability. The neutrino oscillation is confirmed in both a reduction of muon neutrinos and a distortion of the observed neutrino energy spectrum. K2K also measure the neutrino oscillation parameters.