Abstract
We present results for oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy-dependent disappearance of , which we presume have oscillated to . The probability that we would observe these results if there is no neutrino oscillation is 0.0050% ().
- Received 9 November 2004
DOI:https://doi.org/10.1103/PhysRevLett.94.081802
©2005 American Physical Society