[1] UNIV TOKYO,INST COSM RAY RES,TANASHI,TOKYO 188,JAPAN
[2] TOKYO METROPOLITAN COLL AERONAUT ENGN,TOKYO 116,JAPAN
[3] YOKOHAMA NATL UNIV,FAC EDUC,YOKOHAMA,KANAGAWA 240,JAPAN
[4] SHONAN INST TECHNOL,FIJISAWA 251,JAPAN
[5] KANAGAWA UNIV,FAC ENGN,YOKOHAMA 221,JAPAN
[6] KONAN UNIV,DEPT PHYS,KOBE 658,JAPAN
[7] TIBET UNIV,DEPT MATH & PHYS,LHASA 850000,PEOPLES R CHINA
[8] ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING 100034,PEOPLES R CHINA
[9] YUNNAN UNIV,DEPT PHYS,KUNMING 650091,PEOPLES R CHINA
[10] SW JIAOTONG UNIV,DEPT PHYS,CHENGDU 610031,PEOPLES R CHINA
[11] UTSUNOMIYA UNIV,DEPT EDUC,UTSUNOMIYA,TOCHIGI 321,JAPAN
[12] SAITAMA UNIV,DEPT PHYS,URAWA,SAITAMA 338,JAPAN