[1] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218
[2] RHEIN WESTFAL TH AACHEN,INST PHYS 1,D-52056 AACHEN,GERMANY
[3] IST NAZL FIS NUCL,I-50125 FLORENCE,ITALY
[4] UNIV FLORENCE,I-50125 FLORENCE,ITALY
[5] NATL CENT UNIV,CHUNGLI 32054,TAIWAN
[6] IST NAZL FIS NUCL,I-06100 PERUGIA,ITALY
[7] UNIV PERUGIA,I-06100 PERUGIA,ITALY
[8] RES INST HIGH ENERGY PHYS,SF-00014 HELSINKI,FINLAND