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Study of the decay B¯0→D*+ωπ-

Aubert, B. et al. (2006) Study of the decay B¯0→D*+ωπ-. Physical Review D, 74 (1). 012001. ISSN 1550-7998

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We report on a study of the decay B̅ 0→D*+ωπ- with the BABAR detector at the PEP-II B-factory at the Stanford Linear Accelerator Center. Based on a sample of 232×106 BB̅ decays, we measure the branching fraction B(B̅ 0→D*+ωπ-)=(2.88±0.21(stat.)±0.31(syst.))×10-3. We study the invariant mass spectrum of the ωπ- system in this decay. This spectrum is in good agreement with expectations based on factorization and the measured spectrum in τ-→ωπ-ντ. We also measure the polarization of the D*+ as a function of the ωπ- mass. In the mass region 1.1 to 1.9 GeV we measure the fraction of longitudinal polarization of the D*+ to be ΓL/Γ=0.654±0.042(stat.)±0.016(syst.). This is in agreement with the expectations from heavy-quark effective theory and factorization assuming that the decay proceeds as B̅ 0→D*+ρ(1450)-, ρ(1450)-→ωπ-.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Depositing User: Sharon Beastall
Date Deposited: 07 Apr 2011 11:40
Last Modified: 28 Aug 2021 11:05


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