A.Yoshida1, C.Signorini2, T.Fukuda3, Y.Watanabe1, N.Aoi4, M.Hirai4, M.Ishihara1,4, H.Kobinata4, Y.Mizoi3, L.Mueller2, Y.Nagashima5, J.Nakano3, T.Nomura3, Y.H.Pu1, F.Scarlassara2 Inst.of Physical and Chemical Res. (RIKEN1 Padua, University and Lab. Naz. Legnaro2 Institute for Nuclear Study, Univ. of Tokyo, Tanashi3 Univ. of Tokyo, Tokyo4 Univ. of Tsukuba, Tsukuba5
Physics Letters,Section B389(1996)457