Study of the decayB¯0→D*+ωπ−

2006/04/05 by The BABAR Collaboration, R. Barate, B. Aubert +98 · 18 citations
Chemistry · Mathematics · Physics and Astronomy · #Algorithm #Analytical Chemistry (journal) #Branching fraction #Chemistry #Dark Matter and Cosmic Phenomena #Electron–positron annihilation #Factorization #Hadron #Mathematics #Nuclear physics #Omega #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex

paper · pdf · doi:10.1103/physrevd.74.012001

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 74(1) (American Physical Society) · 12 pages, 10 postscript figues, submitted to Phys. Rev. D

arxiv created 2006/04/05 · openalex publication_date 2006/07/05 · arxiv updated 2010/03/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

We report on a study of the decay B⁰\ensuremath→D^*+\ensuremathω\ensuremathπ^\ensuremath- with the BABAR detector at the PEP-II B-factory at the Stanford Linear Accelerator Center. Based on a sample of 232\ifmmode×\else\texttimes\fi10⁶ BB decays, we measure the branching fraction B(B⁰\ensuremath→D^*+\ensuremathω\ensuremathπ^\ensuremath-)=(2.88\ifmmode±\else\textpm\fi0.21(stat.)\ifmmode±\else\textpm\fi0.31(syst.))\ifmmode×\else\texttimes\fi10^\ensuremath-3. We study the invariant mass spectrum of the \ensuremathω\ensuremathπ^\ensuremath- system in this decay. This spectrum is in good agreement with expectations based on factorization and the measured spectrum in \ensuremathτ^\ensuremath-\ensuremath→\ensuremathω\ensuremathπ^\ensuremath-\ensuremathν_\ensuremathτ. We also measure the polarization of the D^*+ as a function of the \ensuremathω\ensuremathπ^\ensuremath- mass. In the mass region 1.1 to 1.9 GeV we measure the fraction of longitudinal polarization of the D^*+ to be \ensuremathΓ_L/\ensuremathΓ=0.654\ifmmode±\else\textpm\fi0.042(stat.)\ifmmode±\else\textpm\fi0.016(syst.). This is in agreement with the expectations from heavy-quark effective theory and factorization assuming that the decay proceeds as B⁰\ensuremath→D^*+\ensuremathρ(1450)^\ensuremath-, \ensuremathρ(1450)^\ensuremath-\ensuremath→\ensuremathω\ensuremathπ^\ensuremath-.

Citations

• THE USE OF MULTIPLE MEASUREMENTS IN TAXONOMIC PROBLEMS
• Measurement ofB0→Ds(*)+D*−branching fractions andB0→Ds*+D*−polarization with a partial reconstruction technique
• The BABAR detector
• First observation ofB¯→D(*)ρ′−,ρ′−→ωπ−
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)