Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8199912 | Physics Letters B | 2006 | 10 Pages |
Abstract
We have measured the branching fractions for the exclusive decay modes BâÏc1(2)K(Kâ) using a 140fbâ1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+eâ collider. The measured branching fractions for B+âÏc1K+, B0âÏc1K0, B0âÏc1Kâ0 and B+âÏc1Kâ+ decay modes are (4.5±0.2±0.5)Ã10â4, (3.5±0.3±0.5)Ã10â4, (3.1±0.3±0.7)Ã10â4 and (4.1±0.6±0.9)Ã10â4, respectively, where the first error is statistical and the second error is systematic. We do not observe statistically significant signals for the BâÏc2K(Kâ) decay modes and set upper limits at the 90% confidence level. We also study the helicity distribution for BâÏc1Kâ decay mode and show that the longitudinal polarization component is dominant.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Belle Collaboration Belle Collaboration, N. Soni, K. Abe, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, A.M. Bakich, E. Barberio, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, M. BraÄko, V. Zhilich,