Affiliation: | 1. CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland;2. Department of Physics and Sezione INFN, I-15132 Genoa, Italy;3. Department of Physics and Sezione INFN, I-56100 Pisa, Italy;4. Department of Physics and Sezione INFN, I-80125 Naples, Italy;5. NIKHEF-H, 1009 DB Amsterdam, The Netherlands |