The Results of Oscillation Analysis in K2K Experiment And An Overview of JHFnu Experiment

Abstract

This paper presents the results of oscillation analysis in K2K experiment. The results show indications of neutrino oscillation and give a new constraint on the oscillation parameters. The difference of neutrino masses squared $\Delta m^2$ lies between 1.5 and 3.9$\times 10^{-3}{\mathrm{eV}}^2$ at ${\sin }^{2}2\theta =1$ with the confidence level of 90%. In addition to these results, a brief overview of future long-baseline neutrino experiment in Japan, JHF-$\nu$ experiment, is also given in this paper.

16 pages, 20 figures, the proceedings for the XXXVIIIth Recontres de Moriond on Electroweak Interaction and Unified Theories, Les Arcs, France, March 15-22, 2003 Ver. 2: Some errors fixed