Measurement Of B0 Ds D Branching Fractions And B0 Ds D Polarization With A Partial Reconstruction Technique
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Measurement of B0-]Ds(*)+D*- Branching Fractions and B0-]Ds*+D*- Polarization with a Partial Reconstruction Technique
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The authors present a study of the decays B[sup 0][yields] D[sub s][sup (*)+] D*[sup -], using 20.8 fb[sup -1] of e[sup+]e[sup -] annihilation data recorded with the BABAR detector. The analysis is conducted with a partial reconstruction technique, in which only the D[sub s][sup (*)+] and the soft pion from the D*[sup -] decay are reconstructed. They measure the branching fractions[Beta](B[sup 0][yields] D[sub s][sup (*)+] D*[sup -])= (1.03[+-] 0.14[+-] 0.13[+-] 0.26)% and[Beta](B[sup 0][yields] D[sub s][sup (*)+] D*[sup -])= (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][sup+][yields][phi][pi][sup+] branching fraction uncertainty. From the B[sup 0][yields] D[sub s][sup (*)+] D*[sup -] angular distributions, they measure the fraction of longitudinal polarization[Lambda][sub L]/[Lambda]= (51.9[+-] 5.0[+-] 2.8)%, which is consistent with theoretical predictions based on factorization.
MEASUREMENT OF B0 ---] D(S)(*)+D*- BRANCHING FRACTIONS AND POLARIZATION IN THE DECAY B0 ---] DS(*FILE) WITH A PARTIAL RECONSTRUCTION TECHNIQUE.
We present measurements of the decays B[sup 0][yields] D[sub s][sup (*)+] D*[sup -], using data recorded by the BABAR detector in 1999 and 2000, consisting of 20.8 fb[sup -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*[sup -] decay are reconstructed. From the observed rates, we measure the branching fractions[Beta](B[sup 0][yields] D[sub s][sup+] D*[sup -])= (1.03[+-] 0.14[+-] 0.13[+-] 0.26)% and[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -])= (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][sup+][yields][phi][pi][sup+] branching fraction uncertainty. From the[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -]) angular distributions, we measure the fraction of longitudinal polarization[Lambda][sub L]/[Lambda]= (51.9[+-] 5.0[+-] 2.8)%, which is consistent with the theoretical prediction, based on factorization. These results are preliminary.
High Energy Physics: Ichep 2000 - Proceedings Of The 30th International Conference (In 2 Volumes)
This book presents topics of major interest to the high energy physics community, as well as recent research results.