Phys. Rev. D 62, 112003 (2000) [13 pages]

Measurement of B⃗D_s^()+D^(*) branching fractions

Abstract

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S. Ahmed et al. (CLEO Collaboration)
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Received 8 August 2000; published 9 November 2000

This article describes improved measurements by CLEO of the B⁰→D_s⁺D^*- and B⁰→D_s^*+D^*- branching fractions, and first evidence for the decay B⁺→D_s^(*)+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 D_s^*+ polarization in the decay B⁰→D_s^*+D^*-. A partial reconstruction technique, employing only the fully reconstructed D_s⁺ and slow pion π_s^- from the D^*-→D⁰π_s^- decay, enhances sensitivity. The observed branching fractions are B(B⁰→D_s⁺D^*-)=(1.10±0.18±0.10±0.28)%, B(B⁰→D_s^*+D^*-)=(1.82±0.37±0.24±0.46)%, and B(B⁺→D_s^(*)+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 D_s⁺→φπ⁺ branching fraction. The measured D_s^*+ longitudinal polarization, Γ_L/Γ=(50.6±13.9±3.6)%, is consistent with the factorization prediction of 54%.

URL:

http://link.aps.org/doi/10.1103/PhysRevD.62.112003

DOI:

10.1103/PhysRevD.62.112003

PACS:

13.20.He, 12.15.Hh, 14.40.Nd

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Phys. Rev. D 62, 112003 (2000) [13 pages]

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

Measurement of B⃗D_s^()+D^(*) branching fractions