2003/03/22 by The DELPHI Collaboration, P. Abreu, J. Abdallah +98 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/s0370-2693(03)00387-3
published as Phys.Lett.B561:26-40,2003 · 18 pages, 6 figures, Accepted by Phys. Lett. B
arxiv created 2003/03/22 · openalex publication_date 2003/04/30 · arxiv updated 2009/11/30 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/04
The production of wrong sign charmed mesons b→D(s)X, D(s)=(D0,D+,Ds), is studied using the data collected by the DELPHI experiment in the years 1994 and 1995. Charmed mesons in Z→bb̄ events are exclusively reconstructed by searching for the decays D0→K−π+, D+→K−π+π+ and Ds+→φπ+→K+K−π+. The wrong sign contribution is extracted by using two discriminant variables: the charge of the b-quark at decay time, estimated from the charges of identified particles, and the momentum of the charmed meson in the rest frame of the b-hadron. The inclusive branching fractions of b-hadrons into wrong sign charm mesons are measured to be: B(b→D0X)+B(b→D−X)=(9.3±1.7(stat)±1.3(syst)±0.4(B))%, B(b→Ds−X)=(10.1±1.0(stat)±0.6(syst)±2.8(B))% where the first error is statistical, the second and third errors are systematic.