[1] High Energy Accelerator Res Org, IPNS KEK, Belle Grp, Div Phys, Ibaraki, Osaka 305, Japan
[2] Nagoya Univ, Dept Phys, Nagoya, Aichi 464, Japan
[3] Tokyo Univ Agr & Technol, Dept Appl Phys, Tokyo 184, Japan
[4] Fukui Univ, Fac Engn, Fukui 901, Japan
[5] Sugiyama Jogakuen Univ, Sch Sci, Aichi 47001, Japan