Measurement of |Vcb| and the form-factor slope in B[bar]→Dℓ−ν[bar]ℓ decays in events tagged by a fully reconstructed B meson
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| and the form-factor slope ρ2 in B[bar]→Dℓ−ν[bar]ℓ decays based on 460×106 BB[bar] events recorded at the Υ(4S) resonance with the BABAR detector. B[bar]→Dℓ−ν[bar]ℓ decays are selected in events in which a hadronic decay o...
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| Main Authors: | , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
5 January 2010
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| In: |
Physical review letters
Year: 2010, Volume: 104, Issue: 1, Pages: 1-7 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.104.011802 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.104.011802 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.104.011802 
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| Author Notes: | BABAR Collaboration* |
| Summary: | We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| and the form-factor slope ρ2 in B[bar]→Dℓ−ν[bar]ℓ decays based on 460×106 BB[bar] events recorded at the Υ(4S) resonance with the BABAR detector. B[bar]→Dℓ−ν[bar]ℓ decays are selected in events in which a hadronic decay of the second B meson is fully reconstructed. We measure B(B−→D0ℓ−ν[bar]ℓ)/B(B−→Xℓ−ν[bar]ℓ)=(0.255±0.009±0.009) and B(B[bar]0→D+ℓ−ν[bar]ℓ)/B(B[bar]0→Xℓ−ν[bar]ℓ)=(0.230±0.011±0.011), along with the differential decay distribution in B[bar]→Dℓ−ν[bar]ℓ decays. We then determine G(1)|Vcb|=(42.3±1.9±1.4)×10−3 and ρ2=1.20±0.09±0.04, where G(1) is the hadronic form factor at the point of zero recoil. |
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| Item Description: | *BABAR Collaboration: B. Aubert, J. Marks, S. Schenk, U. Uwer [und 489 weitere Personen] Im Titel steht der Buchstabe B sowie der Buchstabe v mit einem Oberstrich Im Titel ist der Ausdruck "cb" sowie der zweite Buchstabe l tiefgestellt Im Titel ist das Minuszeichen hochgestellt Gesehen am 28.11.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.104.011802 |