Study of the decay B¯0D*+ωπ

B. Aubert et al. (BABAR Collaboration)
Phys. Rev. D 74, 012001 – Published 5 July 2006

Abstract

We report on a study of the decay B¯0D*+ωπ with the BABAR detector at the PEP-II B-factory at the Stanford Linear Accelerator Center. Based on a sample of 232×106 BB¯ decays, we measure the branching fraction B(B¯0D*+ωπ)=(2.88±0.21(stat.)±0.31(syst.))×103. 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 τωπντ. 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 B¯0D*+ρ(1450), ρ(1450)ωπ.

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  • Received 4 April 2006

DOI:https://doi.org/10.1103/PhysRevD.74.012001

©2006 American Physical Society

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Vol. 74, Iss. 1 — 1 July 2006

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