We present a study of the decays B0→Ds*+D*-, using 20.8 fb-1 of e+e- annihilation data recorded with the BABAR detector. The analysis is conducted with a partial reconstruction technique, in which only the D(*)+ and the soft pion from the D*- decay are reconstructed. We measure the branching fractions γ(B0 →Ds+D*-)= (1.03±0.14±0.13±0.26)% and ß(B0→Ds *+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 Ds+→φπ+ branching fraction uncertainty. From the B0→Ds*+D*- angular distributions, we measure the fraction of longitudinal polarization ΓL/Γ=(51.9±5.0±2.8)%, which is consistent with theoretical predictions based on factorization.

Aubert, B., Barate, R., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., et al. (2003). Measurement of B0→Ds(*)+D*- branching fractions and B0→Ds*+D*- polarization with a partial reconstruction technique. PHYSICAL REVIEW D, 67(9), 1-8 [10.1103/PhysRevD.67.092003].

Measurement of B0→Ds(*)+D*- branching fractions and B0→Ds*+D*- polarization with a partial reconstruction technique

CARPINELLI, Massimo;
2003

Abstract

We present a study of the decays B0→Ds*+D*-, using 20.8 fb-1 of e+e- annihilation data recorded with the BABAR detector. The analysis is conducted with a partial reconstruction technique, in which only the D(*)+ and the soft pion from the D*- decay are reconstructed. We measure the branching fractions γ(B0 →Ds+D*-)= (1.03±0.14±0.13±0.26)% and ß(B0→Ds *+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 Ds+→φπ+ branching fraction uncertainty. From the B0→Ds*+D*- angular distributions, we measure the fraction of longitudinal polarization ΓL/Γ=(51.9±5.0±2.8)%, which is consistent with theoretical predictions based on factorization.
Articolo in rivista - Articolo scientifico
BABAR detector
English
1
8
8
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Barate, R., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., et al. (2003). Measurement of B0→Ds(*)+D*- branching fractions and B0→Ds*+D*- polarization with a partial reconstruction technique. PHYSICAL REVIEW D, 67(9), 1-8 [10.1103/PhysRevD.67.092003].
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