2003/02/13 by The BABAR Collaboration, B. Aubert, R. Barate +98 · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.67.092003
published as Phys.Rev.D67:092003,2003 · 9 pages, 4 postscript figues, submitted to Physical Review D (Rapid Communications)
arxiv created 2003/02/13 · openalex publication_date 2003/05/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We present a study of the decays B0\ensuremath→Ds(*)+D^*\ensuremath-, using 20.8 fb^\ensuremath-1 of e+e^\ensuremath- annihilation data recorded with the BABAR detector. The analysis is conducted with a partial reconstruction technique, in which only the Ds(*)+ and the soft pion from the D^*\ensuremath- decay are reconstructed. We measure the branching fractions B(B0\ensuremath→Ds+D^*\ensuremath-)=(1.03\ifmmode±\else\textpm\fi0.14\ifmmode±\else\textpm\fi0.13\ifmmode±\else\textpm\fi0.26)% and B(B0\ensuremath→Ds*+D^*\ensuremath-)=(1.97\ifmmode±\else\textpm\fi0.15\ifmmode±\else\textpm\fi0.30\ifmmode±\else\textpm\fi0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the Ds+\ensuremath→\ensuremathφ\ensuremathπ+ branching fraction uncertainty. From the B0\ensuremath→Ds*+D^*\ensuremath- angular distributions, we measure the fraction of longitudinal polarization \ensuremathΓL/\ensuremathΓ=(51.9\ifmmode±\else\textpm\fi5.0\ifmmode±\else\textpm\fi2.8)%, which is consistent with theoretical predictions based on factorization.