The result on the neutrino oscillation from K2K<br> 
Tsuyoshi Nakaya<br> 
Kyoto U. <br><br> 
Abstract<br> 

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.