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Measurement of the branching fraction of $$B rightarrow D^{(*)}pi ellnu$$ at Belle using hadronic tagging in fully reconstructed events

Vossen, A.*; Tanida, Kiyoshi   ; Belle Collaboration*; 164 of others*

We report a measurement of the branching fraction of the decay $$B rightarrow D^{(*)}pi ellnu$$. The analysis uses 772$$times 10^6$$ $$Bbar{B}$$ pairs produced in $$e^+e^-rightarrow Upsilon(4S)$$ data recorded by the Belle experiment at the KEKB asymmetric-energy $$e^+e^-$$ collider. The tagging $$B$$ meson in the decay is fully reconstructed in a hadronic decay mode. On the signal side, we reconstruct the decay $$B rightarrow D^{(*)}pi ellnu$$ $$(ell=e,mu)$$. The measured branching fractions are $$mathcal{B}(B^+ rightarrow D^-pi^+ ell^+nu)$$ = [4.55 $$pm$$ 0.27 (stat.) $$pm$$ 0.39 (syst.)]$$times 10^{-3}$$, $$mathcal{B}(B^0 rightarrow bar{D}^0pi^- ell^+nu)$$ = [4.05 $$pm$$ 0.36 (stat.) $$pm$$ 0.41 (syst.)]$$times 10^{-3}$$, $$mathcal{B}(B^+ rightarrow D^{*-}pi^+ ell^+nu)$$ = [6.03 $$pm$$ 0.43 (stat.) $$pm$$ 0.38 (syst.)]$$times 10^{-3}$$, and $$mathcal{B}(B^0 rightarrow bar{D}^{*0}pi^- ell^+nu)$$ = [6.46 $$pm$$ 0.53 (stat.) $$pm$$ 0.52 (syst.)]$$times 10^{-3}$$. These are in good agreement with the current world average values.

Language

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English

Journal

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Physical Review D

Volume

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98

Number

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1

Pages

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p.012005_1 - 012005_9

Publication Year/Month

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2018/07

Meeting title

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Held date

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Location (country)

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Patent information

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PDF

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AA2018-0592.pdf:0.42MB

Paper URL

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https://doi.org/10.1103/PhysRevD.98.012005

DOI for research data

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Link to research data related to this paper/report.

Keywords

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no keyword

Research Facility

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Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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高エネルギー加速器研究機構

Accesses

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- Accesses

InCites™

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Percentile:27.79

Category:Astronomy & Astrophysics

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