2004/11/08 by R. Godang, Romulus Godang
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1142/s0217751x05027084
published as Int.J.Mod.Phys.A20:3605-3608,2005 · Latex, 5 pages, 2 figures, proceedings to the DPF 2004, 26 August-31 August 2004, Riverside, CA, USA
arxiv created 2004/11/08 · openalex publication_date 2005/06/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report the first measurement of the absolute branching fraction [Formula: see text] at the ϒ(4S) resonance using data collected with the BABAR detector at the PEP-II asymmetric-energy e + e - storage ring. The analysis is performed with partial reconstruction of the decay [Formula: see text], where the presence of a signal decay is determined using only the lepton and the soft pion from the D* decay. By reconstructing events with one or two signal decays, we obtain a preliminary result of [Formula: see text]. Our result does not depend on branching fractions of the [Formula: see text] and the D* + decays, on the individual simulated reconstruction efficiencies, on the ratio of the charged and neutral B meson lifetimes, or on the assumption of isospin symmetry.