A Measurement of Semileptonic B Decays to Narrow Orbitally-Excited Charm Mesons

Abstract

The decay chain b -> Bbar -> D^{**0} l nu X, D^{**0} -> D^{*+} pi^-, D^{*+} -> D^0 pi^+, D^0 ->(Kpi or K3pi) is identified in a sample of 3.9 million hadronic Z decays collected with the OPAL detector at LEP. The branching ratio BR (b -> Bbar) x BR (Bbar -> D^0_1 l nu X) x BR (D^0_1 -> D^{*+} pi^-) is measured to be (2.64 +- 0.79 (stat) +- 0.39 (syst)) X 10^-3 for the J^P = 1^+ (D^0_1) state. For decays into the J^P = 2^+ (D^{*0}_2) state, an upper limit of 1.4 X 10^-3 is placed on the branching ratio at the 95% confidence level.

arXiv comment20 pages, 6 figures

References in corpus (9)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Heavy Quark Symmetry
• Semileptonic Meson Decays in the Quark Model: An Update
• Leptonic and Semileptonic Decays of Charm and Bottom Hadrons
• Semileptonic B decays to excited charmed mesons
• Investigation of Semileptonic $B$ Meson Decay to P-Wave Charm Mesons
• A Measurement of Rb using a Double Tagging Method
• Bose-Einstein correlations in charged kaon pairs from Z0 decays into two hadronic jets
• Investigation of the Decay of Orbitally-Excited B Mesons and First Measurement of the Branching Ratio BR(B*_J->B*pi(X))

Cited by in corpus (9)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Scaling violations of quark and gluon jet fragmentation functions in e+e- annihilations at sqrt(s) = 91.2 and 183-209 GeV
• Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons
• Measurement of Semileptonic Branching Fractions of B Mesons to Narrow D** States
• Coherence phenomena between initial and final state radiation in a dense QCD medium
• The Evolution of Hadron Spectra in the Modified Leading Logarithm Approximation
• Jet Mass Dependence of Fragmentation in Positron-Proton Collisions