Institute of High Energy Physics Beijing 100049 China;
G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090 Russia;
Also at the Novosibirsk State University Novosibirsk 630090 Russia;
Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA;
Bochum Ruhr-University D-44780 Bochum Germany;
University of Rochester Rochester New York 14627 USA;
University of Turin I-10125 Turin Italy;
INFN I-10125 Turin Italy;