CELLO Collaboration,H. J. Behrend,H. Fenner,M. -J. Schachter,V. Schröder,H. Sindt,G. D'agostini,W. -D. Apel,J. Engler,G. Flügge,D. C. Fries,W. Fues,K. Gamerdinger,G. Hopp,H. Kuster,H. Müller,H. Randoll,G. Schmidt,H. Schneider,W. Dé Boer,G. Buschhorn,G. Grindhammer,P. Grosse-Wiesmann,B. Gunderson,C. Kiesling,R. Kotthaus,U. Kruse,H. Lierl,D. Lüers,H. Oberlack,P. Schacht,P. Colas,A. Cordier,M. Davier,D. Fournier,J. F. Grivaz,J. Haissinski,V. Journé,F. Laplanche,U. Mallik,J. -J. Veillet,J. H. Field,R. George,M. Goldberg,B. Grossetête,O. Hamon,F. Kapusta,F. Kovács,G. London,L. Poggioli,M. Rivoal,R. Aleksan,J. Bouchez,G. Carnesecchi,G. Cozzika,Y. Ducros,A. Gaidot,Y. Lavagne,J. Paméla,J. P. Pansart,F. Pierre;CELLO Collaboration;H. J. Behrend;H. Fenner;M. -J. Schachter;V. Schröder;H. Sindt;G. D'agostini;W. -D. Apel;J. Engler;G. Flügge;D. C. Fries;W. Fues;K. Gamerdinger;G. Hopp;H. Kuster;H. Müller;H. Randoll;G. Schmidt;H. Schneider;W. Dé Boer;G. Buschhorn;G. Grindhammer;P. Grosse-Wiesmann;B. Gunderson;C. Kiesling;R. Kotthaus;U. Kruse;H. Lierl;D. Lüers;H. Oberlack;P. Schacht;P. Colas;A. Cordier;M. Davier;D. Fournier;J. F. Grivaz;J. Haissinski;V. Journé;F. Laplanche;U. Mallik;J. -J. Veillet;J. H. Field;R. George;M. Goldberg;B. Grossetête;O. Hamon;F. Kapusta;F. Kovács;G. London;L. Poggioli;M. Rivoal;R. Aleksan;J. Bouchez;G. Carnesecchi;G. Cozzika;Y. Ducros;A. Gaidot;Y. Lavagne;J. Paméla;J. P. Pansart;F. Pierre;