Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1852279 | Physics Letters B | 2008 | 6 Pages |
Abstract
We report the first observation of two Cabibbo-suppressed decay modes, Îc+âΣ+ÏâÏ+ and Îc+âΣâÏ+Ï+. We observe 59±14 over a background of 87, and 22±8 over a background of 13 events, respectively, for the signals. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600GeV/c Σâ beam. The branching ratios of the decays relative to the Cabibbo-favored Îc+âÎâÏ+Ï+ are measured to be B(Îc+âΣ+ÏâÏ+)/B(Îc+âÎâÏ+Ï+)=0.48±0.20, and B(Îc+âΣâÏ+Ï+)/B(Îc+âÎâÏ+Ï+)=0.18±0.09, respectively. We also report branching ratios for the same decay modes of the Îc+ relative to Îc+âpKâÏ+.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
SELEX Collaboration SELEX Collaboration, E. Vázquez-Jáuregui, J. Engelfried, U. Akgun, G. Alkhazov, J. Amaro-Reyes, A.G. Atamantchouk, A.S. Ayan, M.Y. Balatz, A. Blanco-Covarrubias, N.F. Bondar, P.S. Cooper, L.J. Dauwe, G.V. Davidenko, U. Dersch,