Download or read book MEASUREMENT OF B0 ---] D(S)(*)+D*- BRANCHING FRACTIONS AND POLARIZATION IN THE DECAY B0 ---] DS(*FILE) WITH A PARTIAL RECONSTRUCTION TECHNIQUE. written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the decays B° → D{sub s}{sup (*)+} D*−, using data recorded by the BABAR detector in 1999 and 2000, consisting of 20.8 fb−1. The analysis is conducted with a partial reconstruction technique, in which only the D{sub s}{sup (*)+} and the soft pion from the D*− decay are reconstructed. From the observed rates, we measure the branching fractions?(B° → D{sub s} D*−) = (1.03 ± 0.14 ± 0.13 ± 0.26)% and?(B° → D*{sub s}+ D*−) = (1.97 ± 0.15 ± 0.30 ± 0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the D{sub s}+ →??+ branching fraction uncertainty. From the?(B° → D*{sub s}+ D*−) angular distributions, we measure the fraction of longitudinal polarization?{sub L}/? = (51.9 ± 5.0 ± 2.8)%, which is consistent with the theoretical prediction, based on factorization. These results are preliminary.