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Measurement of |Vcb| and the form-factor slope in B̅ →Dℓ-ν̅ ℓ decays in events tagged by a fully reconstructed B meson
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BaBar Collaboration (Including:
). (2010) Measurement of |Vcb| and the form-factor slope in B̅ →Dℓ-ν̅ ℓ decays in events tagged by a fully reconstructed B meson. Physical Review Letters, Vol.104 (No.1). Article: 011802 . doi:10.1103/PhysRevLett.104.011802 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.104.011802
Abstract
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar and the form-factor slope rho(2) in (B) over bar -> Dl(-) (nu) over bar (l) decays based on 460 X 10(6) B (B) over bar events recorded at the Gamma(4S) resonance with the BABAR detector. (B) over bar -> Dl(-) (nu) over bar (l) decays are selected in events in which a hadronic decay of the second B meson is fully reconstructed. We measure B(B- -> D(0)l(-) (nu) over bar (l))/B(B- -> Xl(-) (nu) over bar (l)) = (0.255 +/- 0.009 +/- 0.009) and B((B) over bar (0) -> D(+)l(-) (nu) over bar (l))/B((B) over bar (0) -> Xl(-) (nu) over bar (l)) = (0.230 +/- 0.011 +/- 0.011), along with the differential decay distribution in (B) over bar -> Dl(-) (nu) over bar (l) decays. We then determine G(1)vertical bar V-cb vertical bar = 42.3 +/- 1.9 +/- 1.4) X 10(-3) and rho(2) = 1.20 +/- 0.09 +/- 0.04, where G(1) is the hadronic form factor at the point of zero recoil.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 8 January 2010 | ||||
| Dates: |
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| Volume: | Vol.104 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | Article: 011802 | ||||
| DOI: | 10.1103/PhysRevLett.104.011802 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Funder: | DOE, NSF (USA), NSERC (Canada), CEA, CNRS-IN2P3 (France), BMBF, DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MIST (Russia), MEC (Spain), STFC (United Kingdom), European Union, A. P. Sloan Foundation |
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