A.Manabe1,I.Arai1,M.Ninomiya1,H.Nunokawa1,M.Tanaka1, K.Tomizawa1,K.Yagi1,T.Nagae2,H.Sano2,S.Sasaki2, K.Tokushuku2,J.Chiba3,T.Kobayashi3 Univ. of Tsukuba, Tsukuba1 Univ. of Tokyo, Tokyo2 High Energy Accelerator Res. Org. (KEK3
Physical Review Letters63(1989)490