Measurement of BDs(*)+D*(*) branching fractions

S. Ahmed et al. (CLEO Collaboration)
Phys. Rev. D 62, 112003 – Published 9 November 2000
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Abstract

This article describes improved measurements by CLEO of the B0Ds+D* and B0Ds*+D* branching fractions, and first evidence for the decay B+Ds(*)+D**0, where D**0 represents the sum of the D1(2420)0, D2*(2460)0, and D1(j=1/2)0L=1 charm meson states. Also reported is the first measurement of the Ds*+ polarization in the decay B0Ds*+D*. A partial reconstruction technique, employing only the fully reconstructed Ds+ and slow pion πs from the D*D0πs decay, enhances sensitivity. The observed branching fractions are B(B0Ds+D*)=(1.10±0.18±0.10±0.28)%, B(B0Ds*+D*)=(1.82±0.37±0.24±0.46)%, and B(B+Ds(*)+D**0)=(2.73±0.78±0.48±0.68)%, where the first error is statistical, the second systematic, and the third is the uncertainty in the Ds+φπ+ branching fraction. The measured Ds*+ longitudinal polarization, ΓL/Γ=(50.6±13.9±3.6)%, is consistent with the factorization prediction of 54%.

  • Received 8 August 2000

DOI:https://doi.org/10.1103/PhysRevD.62.112003

©2000 American Physical Society

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Vol. 62, Iss. 11 — 1 December 2000

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