| Affiliation: | III. Physikalisches Institut der Technischen Hochschule, Aachen, Germany;Institut für Hochenergiephysik der AdW, Zeuthen, Berlin, GDR;CERN, European Organisation for Nuclear Research, Geneva, Switzerland;Institute of Nuclear Physics and Techniques, Academy of Mining and Metallurgy and Institute of Nuclear Physics, Cracow, Poland;Blackett Laboratory, Imperial College of Science and Technology, London SW7 2AZ, UK;Institute of Experimental Physics and Institute for Nuclear Research University of Warsaw, Poland |
