Measurement of the branching fractions for B- --> D(*)+ pi- l- nu-bar and B0bar --> D(*)0 pi+ l- nu-bar

Abstract

We report on a measurement of the branching fractions for B- --> D(*)+ pi- l- nu-bar and B0bar --> D(*)0 pi+ l- nu-bar with 275 million BBbar events collected at the Upsilon(4S) resonance with the Belle detector at KEKB. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain Br(B- --> D+ pi- l- nu-bar) = (0.54 +/- 0.07(stat) +/- 0.07(syst) +/- 0.06(BR)) x 10^-2, Br(B- --> D*+ pi- l- nu-bar) = (0.67 +/- 0.11(stat) +/- 0.09(syst) +/- 0.03(BR)) x 10^-2, Br(B0bar --> D0 pi+ l- nu-bar) = (0.33 +/- 0.06(stat) +/- 0.06(syst) +/- 0.03(BR)) x 10^-2, Br(B0bar --> D*0 pi+ l- nu-bar) = (0.65 +/- 0.12(stat) +/- 0.08(syst) +/- 0.05(BR)) x 10^-2, where the third error comes from the error on Bbar --> D(*) l- nu-bar decays. Contributions from B0bar --> D*+ l- nu-bar decays are excluded in the measurement of B0bar --> D0 pi+ l- nu-bar.

arXiv comment6 pages, 10 figures, submitted to Physical Review D (Rapid Communication), the Lepton-Photon 2005 Conference (Uppsala, Sweden) and the HEP2005 Europhysics Conference (Lisboa, Portugal)

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• Study of B- => D**0 pi-(D**0 => D(*)+ pi-) decays
• Soft Pion Emission in Semileptonic $B$-Meson Decays
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• Investigation of Semileptonic $B$ Meson Decay to P-Wave Charm Mesons
• Measurement of |V_ub| using inclusive B -> X_u l nu decays with a novel X_u-reconstruction method
• Determination of |Vcb| using the semileptonic decay \bar{B}^0 --> D^{*+}e^-\barν
• Measurement of the anti-B ---> D* pi lepton anti-neutrino(lepton) Branching Fraction
• Uraltsev Sum Rule in Bakamjian-Thomas Quark Models

Cited by in corpus (9)

• A Hierarchical NeuroBayes-based Algorithm for Full Reconstruction of B Mesons at B Factories
• Moments of the Hadronic Invariant Mass Spectrum in B --> X_c l nu Decays at Belle
• Determination of the Form Factors for the Decay B0 -> D*- l+ nu_l and of the CKM Matrix Element |V_cb|
• Moments of the electron energy spectrum and partial branching fraction of $B\to X_{c}e\nu$ decays at Belle
• Study of B -> D** l nu with full reconstruction tagging
• Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays
• A Measurement of the Branching Fractions of exclusive Bbar -> D(*)(pi)l-nubar Decays in Events with a Fully Reconstructed B Meson
• B Meson Decays
• Measurement of the Relative Branching Fractions of Bbar --> D/D*/D** l^- anti-nu_l Decays in Events with a Fully Reconstructed B Meson