A Measurement of semileptonic B decays to narrow orbitally excited charm mesons
Collaboration
20 pages
Published in:
- Eur.Phys.J.C 30 (2003) 467-475
e-Print:
- hep-ex/0301018 [hep-ex]
PDG: anything B( )
Report number:
- CERN-EP-2002-094
Experiments:
Citations per year
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.- electron positron: colliding beams
- electron positron: annihilation
- Z0: electroproduction
- Z0: hadronic decay
- bottom
- quark: pair production
- B: semileptonic decay
- charmed meson: excited state
- D*2(2460): hadronic decay
- D*(2010)
References(35)
Figures(0)