Institution: | 1.Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo, 188, Japan ;2.CERN, CH-1211, Geneva, Switzerland ;3.Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113, Japan ;4.Physik-Department E12, Technische Universit?t München, D-85747, Garching, Germany ;5.Gesellschaft für Schwerionenforschung, D-64291, Darmstadt, Germany ; |